Ascotel IntelliGate Telecommunication Systems

DECT Measuring Equipment ME-8User’s Guide

Ascotel IntelliGate Telecommunication Systems

DECT Measuring Equipment ME-8

Content

1 Safety and Liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

2 About this document. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

3 Planning DECT systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

3.1 Ascotel DECT and PBX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

3.2 Coverage area. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

3.3 System characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .123.3.1 Radio characteristic of a radio unit . . . . . . . . . . . . . . . . . . . . . . . . . . .123.3.2 High-frequency propagation conditions. . . . . . . . . . . . . . . . . . . . . . . .133.3.3 Using external antennas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .163.3.4 Using repeaters (relays) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

3.4 Planning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .203.4.1 Ascertaining customer requirements . . . . . . . . . . . . . . . . . . . . . . . . . .213.4.2 Initial rough determination of the radio unit locations . . . . . . . . . . . . .213.4.3 On-site measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .233.4.3.1 Preparing the measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .263.4.3.2 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .313.4.4 Installing the Definitive System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .333.4.5 Re-measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

3.5 DECT Measuring Device ME-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .343.5.1 Test Handsets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .353.5.2 Test radio units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .363.5.3 Operating modes of the handsets for test purposes . . . . . . . . . . . . . .383.5.3.1 "Look Around Mode” . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .383.5.3.2 "Show Measurement Mode" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .533.5.3.3 "Show Handover Mode" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

4 Handset keyboard assignment (long-clicks) . . . . . . . . . . . . . . . . .56


1 Safety and Liability0

Safety Information

Failure to observe this information can be hazardous and infringe existing laws. Please read the Operating Instructions and keep them for future reference. When handing on your handset to others, make sure you enclose these User Guide.

Medical equipment

The handset must not be used near medical equipment, such as pac-ers or hearing aids.

Risk of explosion through sparking

Do not use the handset on premises subject to explosion hazards.

Batteries

Never use ordinary (non-rechargeable) batteriesbut rather only rechargeable batteries. The handset is supplied with rechargeable Ni-MH battery pack. Replacement batteries are availa-ble from your supplier or servicing agent.

Be absolutely sure to observe the "THIS SIDE UP" notice on the lead-acid battery. During recharging, ensure that the battery is positioned so that the indicated side is up. This is for safety reasons, since oth-erwise there is the danger that the battery could leak out.

Never use non-system charging units as they could damage the bat-teries.

Do not dip the batteries in water or throw into the fire.

It is normal for the batteries to become warm when charging.

Do not throw away the batteries with your domestic waste. Take used batteries to an appropriate collection point for recycling or send them back to your supplier or servicing agent.

3 Safety and Liability


Ambient conditions

Do not operate the handset outside the temperature range of +5 °C to approx. +40 °C. Avoid direct sunlight and other sources of heat.

Protect your handset against wetness, heavy dust, corrosive liquids and steam.

Do not expose your handset to electromagnetic fields (electric motors, household appliances). The speech quality could be affected. To pre-vent interference, avoid placing your handset in the immediate vicinity of computers, radios, TV sets, VCRs, and other telephone sets.

Disposal

Be sure to dispose of your phone and its packaging in an environmen-tally compatible way; alternatively send it back to your supplier or servicing agent.

Exclusion of Liability

This product is manufactured in accordance with ISO 9001 quality criteria.

This product and the user information supplied with it have been produced with the utmost care. The product's functions have been tested and approved after comprehensive conformity tests. Nonetheless errors cannot be entirely excluded. The warranty is limited to the replacement of defective hardware.

The manufacturers shall not be liable for any direct or indirect damage that may be caused by incorrect handling, improper use, or any other faulty behaviour on the part of a product. Liability for loss of profit shall be excluded in any case.

Safety and Liability 4


2 About this document

• The following chapter corresponds to the content in Chapter 5, part 3 of the Ascotel System Manual 2025 / 2045 / 2065.

• The numbering of the figures and tables is not identical with the numbering in the system manual. In this document the numbering begins with Fig. 1 and Tab. 1 and is consecutively numbered.

• Cross references to pages, figures and tables in this document refer to this document.

• Cross references in the text to parts and chapters outside the "Planning DECT systems" refer to the specified chapters and pages in the system manual.

5 About this document


3 Planning DECT systems

The following sections take you through the planning procedure for an Ascotel DECT system (DECT: Digital Enhanced Cordless Telecommunica-tions). It contains recommendations on the project sequence and on handling the measuring equipment. Unless otherwise specified, these considerations apply to DECT radio units operated with the integrated antenna. The SB-8ANT radio unit with two external antenna connections is provided for special require-ments or difficult topographical conditions (see "Using external antennas", page 16). For general information on the Ascotel DECT system and its fea-tures, see Ascotel System Manual, part 1.

New planning

A wide range of subjects have to be clarified in depth with the customer before planning a DECT system. DECT systems are very high-performing, which is why they need to be explained in detail. The better customers are informed, the more they will use the system’s features, which in turn means the application will be used more efficiently.

The following points are to be observed in general:

• Radio coverage area, capacity in terms of the number of connections• Known problem areas and what to do about them• Handover behaviour and what happens during a handover• Cordless groups and other features

Project extension

There are different types of extension:

• Additional handsets without a notable increase in traffic– only new entries in the PBX numbering plan

• Additional handsets with an increase in traffic– entries in the PBX numbering plan– Existing radio cells, possibly needing to be reinforced with additional radio

units (warning: radio cells become smaller, resulting in a shift in the handover limits)

– Radio units may need to be distributed to other location areas• Coverage required over a greater area

Planning DECT systems 6


System installation

Once determined, the locations must be observed precisely in order to obtain reproducible results. There are always surprising effects in practice, due for example to cells being set up with several radio units (rather than the one cell originally planned and surveyed). If for example masts are used as mounting structures and fitted on both sides with radio units, conditions on either side of the mast will be different.

For precise installation instructions, refer to Part 4 of Ascotel System Manual.

Re-measuring the Installed System

Before the system can be handed over to the customer, the measurements need to be verified and compared with the values of the original measurement (see "Re-measuring", page 33).

Documentation

The system documentation is an essential requirement. This applies to both the planning and the execution phases. To this end all the data is recorded and set out in a final written version. Modifications and updates must also be doc-umented.

This documentation can then be used as reference in the event of project extensions, enquiries or other matters.



3.1 Ascotel DECT and PBX

The Ascotel DECT system allows users to make and receive telephone calls anywhere on the company premises without being tied down by hard-wired sets. Several radio units form a network of coverage ranges within which a user is able to move freely.

Fig. 1.1: The components of a Ascotel DECT system

The components of an Ascotel DECT system comply with the conditions of the "Digital Enhanced Cordless Telecommunications"standard (DECT). This standard regulates in particular the conditions on the high-frequency radio link and the signalling between handsets and radio units.

Besides system handsets it also possible to operate the installation using prod-ucts that support the GAP (Generic Access Profile) standard. GAP defines a restricted functionality, thereby also supporting the handsets of other manufac-turers. GAP handsets cannot be used for measuring purposes.

Radio unit (RU)

haz1

173a

aene

0

Office 155pro/155ATEXOffice 135/135pro



3.2 Coverage area

The supply range of an Ascotel DECT system can include many different types of geographic geometry. In most cases the bulk of the supply range is inside buildings.

A DECT system always relates to a PINX (Private Integrated Exchange) in a PISN (Private Integrated Services Network). Handover to a neighbouring DECT system in another PINX never occurs, even if the handset is logged on in both systems.

However, the planning can be carried out for both systems as the measuring equipment is used without PBX.

The following explanations describe the situation with a single DECT system.

Fig. 1.2: Examples of the positioning of radio units inside buildings



Topology

A radio system supplies a specific area. This area is known as the supply range. In practice home users are able to receive a variety of autonomous DECT systems (e.g. Ascotel DECT, cordless DECT phones, etc.). An Office handset can be logged on in up to four autonomous DECT systems. The sup-ply ranges for these independent DECT radio systems can also overlap.

Fig. 1.3: Radio system

Supply range of the whole radio system

Radio unit

Coverage range of one single radio unit

haz1174aaena0



Location areas

Location areas are used to divide the radio area into as many as four locally subdivided supply ranges. The system knows the location area in which a handset is located and only needs to send messages to the handset within that location area. Location area partitioning helps to reduce the system load caused by the signalling of incoming calls.

Fig. 1.4: Example of location areas

Distributing radio units among several location areas only makes sense as of a certain system size. The radio units are allocated by means of configuration. For a description of the best way to group the radio units of a system in location areas, see page 28 ff.

Building A

Building B

Courtyard

Location Area 1

Location Area 3

Location Area 2

haz1214aaena0



3.3 System characteristics

3.3.1 Radio characteristic of a radio unit

The coverage range of a radio unit depends among other things on the antenna through which the radio signal is transmitted. The radio units transmit through two integrated antennas inside the housing. The radio characteristic of internal antennas is virtually spherical (with only transmission to the rear slightly dimin-ished), in other words registered handsets are able to move away from the radio unit the same distance in every direction without the radio signal breaking up. This does not take account of the topology that attenuates the signal’s propagation.

Fig. 1.5: Spherical radio characteristic of a DECT radio unit

The radio characteristic within the area to be covered is influenced by the objects and materials located in the buildings. The spherical radio characteris-tic is therefore deformed accordingly depending on local circumstances.

haz0929aaxxa0



Fig. 1.6: Radio characteristic through obstacles to radio propagation

3.3.2 High-frequency propagation conditions

For a better understanding of the explanations on physical conditions given in the following sections, we first need to take a look at the basic principles of high-frequency propagation.

The method under discussion here is DECT standard. It operates in the fre-quency range of 1880...1900 MHz and provides 120 communication channels. All cordless telephony systems are subject in principle to the following expla-nations. The experience gained in planning any system will therefore be very useful when it comes to planning Ascotel DECT systems.

Interference factors

The knowledge of potential reasons for interference can raise the project engi-neer’s awareness to such an extent that many critical points can be avoided already at the design stage of the Ascotel DECT system by using the appropri-ate measures. In radio technology there are many interference factors that affect mainly the range and quality of the transmission.

In principle we need to differentiate between two types of interference factors:

• Interference by obstacles that attenuate and / or reflect radio propagation, causing dead spots



• Interference due to other radio signals, leading to transmission errors

The receive power of DECT signals can fluctuate a great deal, locally, within only a few centimetres (see Fig. 1.7). This means that signal interference can be reduced or eliminated simply by altering the position.

Fig. 1.7: Obstacle-induced attenuation and reflection of DECT signals

Fig. 1.8: Principle of multipath propagation with DECT signals

70

60

50

40

30

rece

ived

pow

er [

dB]

rapid fading (due to stationary waves)

λ/2 = 8 cm

route coveredhaz0818aaena0

slow fading (environment-related)

haz0821aaenb0

dB

t

signal can no longer be detectedhaz0826aaena0



Obstacles may include:

• Moving metal objects such as lifts, cranes, carriages, escalators, blinds, especially ones that are actuated automatically (the influence of such obsta-cles varies and is therefore difficult to assess)

• Metal-panelled rooms and large metal-clad objects such as air conditioners, computer rooms, metallized glassed areas (mirrored), fire protection walls, storage tank installations, refrigerating units, boilers

• Building structures and installations such as steel-reinforced concrete cei-lings and walls, stairways, long corridors, rising mains, cable ducts

• Room furnishings such as metal shelves, file cabinets

Fig. 1.9: Attenuation of RF signals due to walls, windows, plants

Due to their typical furnishings/fixtures projects in the following environments must be regarded as critical:

• Garages / repair workshops• Scrap merchants• Campsites• Galvanizing plants• Metal-working industry

Plants, lightweight partitions, woodenfaçades with standard commercial windows

Brick walls with stnadard commercialwindows

Brick walls with metal-coateddouble-glazed windows

Reinforced concrete walls or ceiling(depending on thickness)

Metal-glass façade with triple glazedwindows

Metal façade without windows

100%

30%

10%

1%

0,5%

0,25%

0,01%

haz1175aaenb0

5 dB

10 dB

20 dB

23 dB

25 dB

40 dB



Reception conditions

Optimising range is a fundamental challenge of radio technology. The recep-tion of information in marginal zones is patchy at best. Practical measurements are carried out on the premises to determine the range.

When instructing users, the following instructions can help to achieve optimum results:

• You can usually improve the connection quality through minor changes in location, e.g. by turning your head or your body.

• Avoid making phone calls in unsuitable places, for example in lifts. Users should be made aware of these zones during instruction.

3.3.3 Using external antennas

The SB-8ANT radio unit with 2 external antenna connections is ideally suited for use in difficult topographical conditions and for special coverage range requirements. External antennas are useful

• for rectifying radio signals, thereby achieving a greater range in one particu-lar direction (e.g. to provide coverage to remote ancillary buildings).

• for providing coverage to an outside area without the shell of the building obstructing the propagation of the radio signals (this is achieved by moun-ting the radio unit within the building and the antennas outside it).

There are different types of antennas, each with highly specific radio charac-teristics for meeting individual coverage requirements; they are best illustrated by radiation patterns.



The first example shows an antenna that radiates evenly horizontally but has a very restricted range vertically. This type is known as an omni-directional gain antenna and improves the horizontal range for a constant radiation output; it is suitable for open, level premises.

Fig. 1.10: Example 1: Omni-directional gain antenna

The second example of an antenna, which radiates directionally both horizon-tally and vertically, is called a corner reflector antenna. It is ideally suited for covering distant remote buildings or areas.

Fig. 1.11: Example 2: Corner reflector antenna

Horizontal

Radiation pattern in relative field strength

Vertical

Horizontal

Radiation pattern in relative field strength

Vertical



The same principle applies to all antenna types: The narrower the horizontal and vertical radiation range, the greater the distances that can be covered. In this connection we talk of antenna gain, which indicates the ratio of the energy radiated in a particular angle to the radiated energy of a standard antenna (usu-ally a λ/2 dipole antenna). An extreme example of this is the radio relay antenna, which is used for transmitting radio signals in a targeted direction from one point to the next.

Note:When using external antennas, the cable length between radio unit and antenna should be as short as possible because the attenuation of the radio signals in send and receive direction is not to be neglected in this frequency range (approx. 1.5 dB per meter for a normal cable). A 4-meter long cable thus compensates for an antenna gain of 6 dB. It may be useful to consider using a special low-attenuation cable.

Fading Effect

If an SB-8ANT radio unit is operated with external antennas, an antenna must always be connected to each of the two antenna connections. The antennas should have the same radio characteristic and also cover the same range. This reduces the occurrence of fading effects (caused by radio signals cancelling one another out through reflections), and considerably improves the connec-tion quality. If such an effect occurs on one of the antennas, the radio unit auto-matically switches over to the second antenna, thereby preventing minor drop-outs. This is referred to as antenna diversity. Fading effects occur mainly inside and between buildings, which provide a great deal of reflection surface. Dual antennas inside a single housing, designed specifically with this effect in mind, are widely available in the market. That is why the radio units themselves are always equipped with two internal antennas. For recommendations regarding manufacturers and antenna type please contact Support ( https://pbxweb.aas-tra.com)


https://pbxweb.aastra.com



3.3.4 Using repeaters (relays)

Repeaters are autonomous devices which increase the range of the DECT sys-tem. When positioning a repeater you need to make sure not only that the cov-erage ranges overlap but also that the repeater is mounted in the coverage range of one radio unit and vice versa. Several repeaters can be allocated to one radio unit. Ring-form (see Fig. 1.12) as well as other arrangements around a radio unit are possible.

Most repeaters operate in "Blind Slot mode" but are also compatible with the Zero-Blind-Slot mode. As they receive and send, only 2 call connections are usually possible simultaneously on each repeater.

A radio unit supports a maximum of 8 simultaneous call connections via repeater (or only 4 with SB-4 / SB-4+). Cascaded repeaters are not supported. However the handover between individual coverage ranges is guaranteed.

Fig. 1.12: Arrangement of repeaters around a radio unit

Even remote buildings can be covered with a repeater by using external anten-nas with rectification.

haz1377aaxxa0



Fig. 1.13: Remote repeater with directional antenna

The use of repeaters is indicated particularly in cases where supply coverage conditions inside buildings are difficult and only a few handsets are being used.

Note:Most repeaters do not support voice data encryption. For this reason the "Encryption" parameter should normally be configured to "No" in the DECT System Configuration.

3.4 Planning

In practice a regulated procedure for planning has proved sensible and, above all, efficient. A considerable increase in efficiency can be achieved through the consistent use of the aids available.

In the following, the planning procedure is described in the form of a "checklist":

1. Ascertain customer requirements.

2. Roughly determine the locations for the radio units.

3. Measure out the DECT system in situ.

4. Install and re-measure the system.

haz1378aaxxa0



3.4.1 Ascertaining customer requirements

Since the aim of Ascotel DECT systems is to cover all kinds of different mobility requirements in a non-standardized environment, we need to determine and record precisely what sort of requirements the customer has in mind. Records avoid misunderstandings and can be used as a working paper (e.g. project progress report) or as specifications to be confirmed by the customer.

Important questions:

• Situation: Where are the calls to be made from – outdoors / indoors?• Premises: What surface area and what height or depth (storeys, basement

floors) form part of the supply range? Recommendation: Ask for a floor plan.• Building structure: What sort of materials and types of construction are the

buildings made of? What sort of structural changes are planned for the near future?

• Subscribers: How many handsets are required? What sort of phoning pat-tern do users have? Recommendation: Allocate in user groups.

• Traffic density: How are the handsets distributed throughout the premises and which users are where?

• Dynamics: How many handsets are expected where and at what times of the day? Recommendation: Take account of special infrastructure areas such as: Canteen: 9:00…10:00, meeting rooms.

3.4.2 Initial rough determination of the radio unit locations

Radio circumstances are difficult to estimate. For this reason, situations regarded as particularly critical need to be determined on site through meas-urements.

This will provide a reliable idea of the equipment required and the locations for the radio units.

The following rules of thumb may be of help:

• Good connections still possible in a horizontal direction behind 2...3 ordinary brick walls; barely any penetration through concrete floors and ceilings in a vertical direction and in ground floor or basement floors, i.e. each storey must be supplied separately. A certain amount of vertical penetration can be



expected from the first floor upwards; generally speaking, radio propagation conditions improve as the distance from the ground increases.

• Openings in obstacles improve radio conditions.• Subsequent furnishing: In empty buildings, the effect of the absence of fur-

niture, machines, partitions, etc., and their room limitation needs to be taken into account. Subsequent extensions and conversions also have an influ-ence.

• It is important to ensure sufficiently large overlap zones between neighbou-ring coverage ranges. The signal should not be too weak that it prevents automatic handover to the next radio unit. Here, it is necessary to find a solu-tion between a large number of radio units and a reasonable coverage of the premises.

• Radio range (guideline values)– up to 30 m in buildings– outdoors up to 250 m.

• Observe the minimum distance between radio units (see part 4 of Ascotel System Manual).

Radio Unit Distances to the PBX

When planning a system it is important to note that with a SB-4 radio unit the power supply can be provided from the AD2 bus for distances of up to 660 m (wire diameter 0.5 mm). From 660 m up to the maximum for the AD2 bus of 1200 m, a local power supply has to be provided with the recommended plug-in power supply unit, d. h. you need to provide a 230 VAC connection.A local power supply is not required for the SB-4+ / SB-8 / SB-8ANT radio unit as it can be powered via the AD2 bus up to 1200 m.

Tip:The SB-4+ / SB-8 / SB-8ANT radio units can also be powered locally to relieve the terminal power supply. This can also render the use of an auxiliary terminal power supply superfluous.



3.4.3 On-site measuring

As soon as the concrete locations for the radio units have been planned, it is recommended to confirm the circumstances in keeping with the plan using on-site measurements.

A detailed description on how to use the test equipment can be found in "DECT Measuring Device ME-8", page 34.

Remarks:

• Installation site for the test radio unit: To carry out the measurements do not place the radio unit on the ground / floor but position it in the location in which it is to be installed later.

• Measurements must be meticulously carried out (no compromises). The objective is optimum radio coverage.

• Documentation: It is advisable to keep a test log so results can be reprodu-ced later. Record the values measured as well as the supply range on the ground plan, horizontal and vertical.

• The measurements provide a reliable idea of the equipment required and the locations for the radio units.

• Co-operation with the customer: As soon as you are able to make sufficiently binding statements about "problem areas", you should involve the customer for clarification purposes. It is imperative that the customer be informed of any areas where coverage is not optimum.

Optimum positioning of the DECT radio unit

The location of the DECT radio unit is determined by a number of different fac-tors:

• Optimum radio coverage of the environment• Conditions inside the building• Installation possibilities• Presence of supply leads and socket outlets• Aesthetic aspects and wishes on the part of the customer• Outside the buildings: weather protection (rain, sun), vandal-proof



DECT radio unit with outdoor supply

The following principles are to be observed when installing DECT radio units on outdoor premises:

• Choose a central position and avoid flat penetration angles• Ensure the chosen location is protected from the weather• Make sure the installation site is chosen sufficiently high to be protected from

acts of vandalism

[1] A flat penetration angle results in a greater attenuation (approx. 30 dB)[2] A steeper penetration angle results in a smaller attenuation (approx. 20 dB)

Fig. 1.14: Optimum positioning of the DECT radio unit on outside walls

Tip:For outdoor supply always check the use of an external antenna (together with an SB-8ANT) or the use of a DECT Repeater. This may result in an optimum and therefore a more cost-effective solution.

ou

tsid

e w

all

25 cmconcrete ceiling

haz0823aaenb0

1 m [1]28 cm [2]



DECT radio unit with indoor supply

Fig. 1.15: Optimum positioning of the DECT radio unit indoors

The following principles are to be observed when installing DECT radio units indoors:

• In indoor supply install the radio units on inner walls rather than outdoor walls.

• Ceiling mounting can also be considered.• Do not install in the immediate vicinity of cable ducts, metal cabinets and

other large metal objects. They obstruct transmission and / or can result in crosstalk. Maintain a distance of > 50 cm!

• Connecting line between PBX and DECT radio unit:Crosstalk can occur here if they are laid in parallel with mains feeder lines inside cable ducts (e.g. engineering workshops). This must be taken into account when choosing the cable and the cable route.

• RF interference fields: PCs and other electronic equipment can affect radio transmission in the vicinity either intermittently or permanently.

• Radio units and handsets generate pulsed RF signals. These can affect sen-sitive electronic equipment (control systems, measuring sensors, sensors, diagnostics equipment on intensive-care wards in hospitals, etc.) perma-nently or temporarily.

approx. 30% of energy becomes dispersed

haz0824aaena0



Note:Take note of safety distances and safety regulations. In areas subject to explosion hazards take note of the relevant rules and regulations.

This important phase of the project is to be explained in greater detail using an example.

3.4.3.1 Preparing the measurements

Factory

2 floorswarehouse /basement

Administration

5 floorsarchive/basement

Porter’s lodge

haz0331aaena0

zone 3

zone 2 zone 4

zone 1

zone 3

zone 5

haz0347aadea0

Drawing up a situation plan:

• The situation plan records approximately the number and size of the coverage ranges required.

• The measurements provide the ideal locations for the radio units.

Radio supply and zone formation:

• Create a sensible distribution, e.g. several zones in the factory and administration (porter’s lodge, basement, etc., in different zones).

• Make a note of the connection capacity required (number of simultaneous calls) for each zone to determine the number of radio units (see also under "Traffic density", page 29).



Global coverage in the supply range

First, ensure that the surface area of the planned supply range is satisfactorily covered.

The ideal locations for the radio units are determined using practical measure-ments.

Fig. 1.16: Global coverage in the supply range

Factory

80 m

30 m

Office Building

Required supply range

Weather-proof installation

haz0332aaena0



Handover overlap areas

Fig. 1.17: Planning handover overlap areas

How to evaluate the field strength measurement values and specify the overlap areas is described in "Measuring", page 31.

Location areas

Up to 4 location areas can be configured in an Ascotel DECT system. With incoming calls each handset is called by the system simultaneously via all the radio units of a location area in which the handset is logged on. As the capacity of the signalling channel is limited, splitting the radio units into several location areas needs to be considered in the following cases:

• As of approx. 80 handsets and a large volume of incoming calls • If more than 9 incoming calls are to be signalled on the handsets within one

second

Distributing the radio units over several location areas ensures that the radio traffic involved in locating handsets for incoming calls is distributed across the

• To guarantee a clean handover, the radio units should be fitted in such a way that the 35–40 dBµV limits are at least in contact.

• When conducting survey measure-ments in unfinished buildings, the limits should be increased by 10 dBµV.

VµBd04

-53

35-40

dBµV

haz0819aaxxa0



location areas. This means that overall more calls can be processed simulta-neously.

If a handset switches from the coverage range of one location to that of another, the handset will automatically log into the new area from scratch. To prevent handsets from constantly logging themselves on in location areas, make sure you observe the following points:

• The radio units of any given location area should cover a contiguous area (see example on page 11).

• Handsets should be used mainly within the same location area.• Handsets should not be continually used in the overlap zone between two

location areas.

Traffic density

Once the supply range has been located and covered, the locations for the radio units are known.

The second phase now looks at other requirements: The traffic volume, deter-mined by the number of handsets and the frequency and duration of connec-tions in an area defined by the customer. In most cases such a zone does not match the coverage range of a radio unit.

For each zone you now need to determine how many radio units are currently being used to supply them. It may be necessary to boost the coverage with additional radio units for insufficiently supplied areas (in accordance with the customer's requirements). To do so we need to refer back to the radio unit loca-tions that were determined for the area coverage. For instance, it is a good idea to place additional radio units at the centre of a zone with a higher traffic vol-ume, even if those units end up between two already positioned radio units.

To determine the traffic volume, we assume three typical ranges: "low", "medium", "high". "High" means that approx. 50% of all handsets are making calls simultaneously. It is also important to note that the volume of traffic can vary considerably in the course of a day. The question is always whether or not to cover a traffic volume that may be higher only briefly in a particular zone.



Hotspots

A hotspot is an area with an above-average number of handsets. Such an area can be covered with several radio units as the resources in the coverage range of neighbouring radio units are cumulated. It is recommended to cover hotspots with several SB-8 (or SB-4+) radio units as they operate in ”Zero-Blind-Slot mode” and the calls can be spread out across 120 radio channels (instead of 60 with SB-4).

In practice it has emerged that interference from neighbouring channels in a hotspot without special measures means that only approximately one quarter of the radio channels can be used simultaneously. This means that approx. 30 simultaneous connections are possible, which require for example four SB-8 radio units. Thus approx. 60 handsets can be used in a hotspot with a high traf-fic volume (simultaneous call connections of approx 50% of the handsets). It is essential to observe the minimum distances when installing the radio units (see Ascotel System Manual, Part 4).

If extensive interference occurs in a hotspot or if more than 30 simultaneous connections are required, check the following measures:

• Distribute the radio units that cover the hotspot spaciously around the hot-spot. In doing so, especially walls can help attenuate the strong signals which the radio units mutually disturb each other. Also check the possibility of a spherical arrangement of the radio units that cover the hotspot through floors and ceilings.With this solution approach, ensure that handsets do not suddenly seize the call channels of the hotspot radio units that were previously supplied by other radio units (when setting up a connection, handsets always seize channels of the radio unit that deliver the strongest signal). It may therefore occur that moving the hotspot radio units triggers a chain reaction and that other radio units have to be re-positioned.

• If it is not possible to spatially move radio units, check the use of external antennas that are connected to type SB-8ANT radio units by means of an attenuator. Under certain circumstances the quality can be noticeably impro-ved. The aim is to reduce the transmitting power (and thereby the reception sensitivity) by 10 to 20 dB. In determining the attenuator the antenna gain is to be taken into account. Most antennas have a gain of 3 to 10 dB. A 20 dB attenuation is usually right. The antenna diversity must not be discontinued, i.e. 2 antennas or a dual antenna per SB-8ANT radio unit must always by connected. To ensure that all calls are evenly distributed to all radio units, it



is mandatory that all hotspot radio units are equipped with attenuators. Addi-tionally, no non-attenuated radio units not belonging to the hotspot are per-mitted in the vicinity. The hotspot handsets otherwise seize, above all, the channels of the non-attenuated radio units, which would then have fewer or no remaining channels at all for their own coverage range.For manufacturer recommendations and information about antennas and attenuations, please contact Support (https://pbxweb.aastra.com).

Note:It is advisable to use not more than 6 SB-8 or SB-8ANT radio units in one hotspot. Full capacity would then mean max. 48 simultaneous connections. Although this is not an absolute system limit, the risk of at least occasional disturbances increases with each additional call channel.

3.4.3.2 Measuring

We are assuming that the project planner is familiar with the information con-tained in the previous sections of this document. The locations entered on the situation plan are definitively fixed using on-site measurements. The ME-8 DECT measuring equipment (see "DECT Measuring Device ME-8", page 34) described below provides the necessary aids.

Functional test prior to use

Prior to any field use, we recommend a functional test of the measuring equip-ment in accordance with the checklist below:

1. Recharge the batteries:– Battery packs of the test HAs with the plug-in power supply units for

direct charging (see page 35)– Lead-acid batteries with the intended plug-in power supply units (switch

must be on 12 V) (see page 36)

2. Put test RUs into operation:– Turn the rotary switch of the test RUs each to a position 1..8 (the position

must not be identical) (see page 36)– Supply power to the test RUs with plug-in power supply units or charged

lead-acid batteries: → Middle LED flashes orange (see page 37)




3. Put test HAs into operation:– Supply power to the test HAs with battery packs or plug-in power supply

unit– Activate the "Look Around Mode" (see page 38)– Select DECT system ”T” (see page 44)

→ After the scanning procedure, all test HAs should see the two test RUs (with the identity corresponding to the position of the HEX rotary switch).→ The displayed field strength measured value (in the lock state) should be at least 80 in the immediate vicinity of the test RU.

4. Check the voice path:– switch 2 test HAs to one test RU and 2 test HAs to the other test RU.– Then set up a call on each (see page 48) and check the voice path.– Connect a headset to each of the 2 test HAs and check the voice path.

Measuring procedure

The following sequence is an example of a possible measuring procedure: Depending on the situation and aim of the measurement, a different procedure may be used. We shall be looking here at a measurement procedure using 2 test radio units.

Typical Sequence of a Measurement Procedure• Mount the two test RUs on the first or second position according to the plan

and supply power using plug-in power supply or battery box.• Activate the ”Look Around Mode” on one test HA, switch to test system ”T”,

and begin measuring the first RU.• Measure out the planned coverage area of the first test RU and enter the

measured values at the key points (critical areas, most distant points, over-lap zones, etc.) on the plan. If the measured values are not satisfactory, find a better location for the test RU and re-measure the same coverage area. The measured values entered on the plan must always also contain a refe-rence to the location of the measured test RUs. Only in this way can measu-rement series be compared to each other and the best possible location be determined for the test RU.

• Switch over to the second RU and measure out its coverage area as descri-bed above.

• In the overlap area of the two test RUs, a value of at least 40 should be measurable.



• Check the connection quality at the critical points with a loopback connec-tion.

• Once the coverage range of the two radio units has been measured out, the radio units are repositioned. It may also make sense to measure out only part of the coverage range and then to shift only one of the two radio units.

Tip:If two people are involved in the measurement, it is advisable to main-tain a continuous call connection. Using the headset permits simulta-neous visual and acoustic checking of the connection quality and the communication among those conducting the measurement. If a per-son is at the test RU, it is easy to determine the optimal location of the RU in terms of the connection.

3.4.4 Installing the Definitive System

For more detailed information, please refer to part 4 of the Ascotel System Manual.

3.4.5 Re-measuring

As soon as the definitive system is installed, test measurements should be car-ried out in handover overlap border areas and compared with the results of the planning (see "On-site measuring", page 23). For this purpose, the handset is switched over to the "Show Measurement Mode" (see "Show Measurement Mode", page 53). If the handover display is also switched on (see "Show Hand-over Mode", page 54), the handset refers visually and acoustically to a hando-ver. Critical areas should be discussed with the customer.



3.5 DECT Measuring Device ME-8

New as well as already installed DECT systems can be measured out and opti-mised with the DECT measuring device ME-8. For easier handling during the measuring procedure, the radio units can be powered with battery packs. The headsets are connected to the test equipment and enable simultaneous visual and acoustic checking of the connection quality as well as the communication among those conducting the measurement during the measuring procedure.

The test kit contains the following equipment:

• 2 SB-8TEST test radio units with HEX rotary switches• 4 Office 135pro test handsets with test software• 2 lead-acid batteries 12 V• 2 charging units for lead-acid batteries 12 V• 2 cables for supplying power to the test radio units from lead-acid battery• 2 plug-in power supply units for supplying power to the test radio units from

a 230 V network• 4 plug-in power supply units for directly charging the test handsets• 2 headsets for connecting to the test handsets• various user's guides and quick user's guides

Fig. 1.18: Test kit and its contents

haz1341aaxxa0



3.5.1 Test Handsets

The 4 test handsets (test HAs) of the ME-8 DECT measuring device contain special test software which extends the functionality of a standard HA for test purposes. For example:

• Loop connections via a test RU• Call connection of two test HAs via the same test RU• Direct dial of a test RU• Switchover between internal and external antennas of a test RU• Switching antenna diversity on/off and selection between antenna 1 and 2.

The "automatic SW upload " function is deactivated in the test HAs to prevent unintentional overwriting of the test software by standard software.

The local menus of the test handsets are only in English to save space.

Only the characteristics necessary for planning are discussed here. For more detailed information, see the user’s guide and quick user’s guide of the hand-sets.

Handset Battery Pack

The operating time with a fully-charged battery pack at room temperature is about 120 hours for standby or 12 hours talk time. Frequent use of the keys with automatic backlighting of the display after pressing keys affects the oper-ating time of the handset. When the backlighting is continuously on, operating time is drastically reduced. Low temperatures also reduce operating time.

When the handsets are not used for longer periods of time, they should always be placed in the test kit without the battery pack, since the batteries discharge over time even if the handsets are switched off.

Further information about the battery pack (handling, inserting the battery pack, etc.) is available in the handset user's guide.



3.5.2 Test radio units

The test software for the test radio unit (test RU) is integrated in the standard software. A rotary switch is on the bottom of the test radio units so that the test HAs can identify the test RUs (position 1..8). Rotary switch positions 0 and E enable normal operation of the test RUs in a system, whereby position 0 switches on automatic SW upload and position E switches it off. Before chang-ing the rotary switch, the test RU must always first be disconnected from the power source.

Power supply

The test RUs are designed to be operated with the 12 V lead-acid batteries, but they can also be operated with the supplied plug-in power supply units. Supp-lying the test RUs with power via the AD2 line, however, is not possible. The lead-acid batteries can be charged while operating the test RUs.

Lead-acid Batteries

The 12 V lead-acid batteries may be charged only with the charging devices intended for that purpose. For charging, the charging device switch must be set to the 12 V position. The LED on the charging device displays the charging sta-tus of the batteries. Lead-acid batteries may be stored only when fully charged.

When the lead-acid batteries are fully charged, the operating time of a test RU is about 12 hours. When the battery charge becomes low, it is indicated by the test RU LED (see Tab. 1.1).

Note:Be absolutely sure to observe the "THIS SIDE UP" notice on the lead-acid battery. During recharging, ensure that the battery is positioned so that the indicated side is up. This is for safety reasons, since oth-erwise there is the danger that the battery could leak out.

Operation with External Antennas

External antennas can be connected to the test RUs for measuring purposes. They can be activated and deactivated with a test HA. The current state is dis-played on the test RU. (See Tab. 1.1). After switching on a test RU, the internal antennas are always active (see "Toggling Internal/External Antennas", page 49).



Operating State Display with LEDs

A test RU, like a normal RU, is fitted with 3 LEDs. The operating state is indi-cated by different colours and flashing sequences in cycles of 1 second. Each character (G=green, R=red, O=orange, - =off) corresponds to 1/8 of a second.

Tab. 1.1: Flashing sequences of the pilot LED on the test RU

Significance of the flashing sequence Cycle

Middle LED:

Test mode active (internal antenna, no connection) O - - - - - - -

Test mode active (external antenna, no connection) O G G G G G G G

Test mode active (internal antenna, 1 or more connections) O O O O - - - -

Test mode active (external antenna, 1 or more connections) O O O O G G G G

Outer LED:

Normal state or RU has disconnected1)

1) If the voltage of the battery falls below a certain level, the power of the radio unit is switched off to conserve the battery. All LEDs of the RU are then switched off.

Control Elements and Connections of the Test RU

Fig. 1.1: Views and connections of the test RU

- - - - - - - -

Power supply critical (battery soon empty) R - - - - - - -

Error R - R - R - R -

haz1432aaxxa0

Internal antenna 2

Internal antenna 1

External antenna connection 1

Front view Rear view

HEX rotary switch

Power supply

Pilot LED

External antenna connection 2



3.5.3 Operating modes of the handsets for test purposes

All Office 135/135pro handsets are able to perform various measurements for test purposes. Three different modes of operation are available:

• "Look Around Mode"Up to 32 RUs can be logged and their parameters displayed.

• "Show Measurement Mode"Display of the current RU’s connection parameters

• "Show Handover Mode"Acoustically and/or visually indicates the handover to another radio unit during a connection.

Additional test HA functions are available in ”Look Around Mode” which make it easy to measure out a DECT system. For example only the test HAs are able to set up a call via a test RU. In the following chapters we deal in particular with the different modes of operation. The possibilities for the test HA are duly noted in each case.

3.5.3.1 "Look Around Mode”

Activating the "Look Around Mode" on a Switched Off HA:

1. Switch handset on

2. During search press the C key: "No System" appears

3. Long-click key 4

Note:If the handset is already connected to a system, long-click 4 does not switch to "Look Around Mode" but rather to "Show Measurement Mode" (see "Show Measurement Mode", page 53)



Activating "Look Around Mode" when the HA is in Another State:

1. Long-click the ”M” key to access the configuration menu

2. Press the ”M” key repeatedly until "Test" appears

3. Press Foxkey "Test"

4. Press the Foxkey "Look"

Exiting "Look Around Mode":

Long-click 4 or long-click C

Displays in "Look Around Mode"

Various information is available in "Look Around Mode" in 4 lines: There are 3 displays in all, and you can move from one to the next by pressing the ”i” key:

Fig. 1.19: Displays in "Look Around Mode"

Standard display

Detail display of ”Bearer information”

Detail display of ”Connection quality”

”i” key

”i” key

”i” key



The Standard display is active after entering "Look Around Mode". The follow-ing example shows the standard display during a scanning procedure in test system T:

Fig. 1.20: Standard display in "Look Around Mode"

Depending on the state, additional icons and other strings are visible.

Standard Display

The meaning of the relevant standard display icons and strings in "Look Around Mode" are explained line by line in the following:

Fig. 1.21: 1st line of the standard display in "Look Around Mode"

amHT i M

65 $$$$ perfect

lock:C000 0-03 X

scan 1/ 4 2haz0931aaxxa0

1st line: Icons2nd Line: Field strength and speech quality3rd line: Status and supplementary information4th line: Fox menu and supplementary information

1st line: Icons

Call connection active (relevant only with test HA)

Loudspeaker on/off (relevant only with test HA)

Microphone on/off (relevant only with test HA)

Press the "M" key for more menus

Press the "i" key for more information

Current DECT system (A, B, C, D, E, T, X, flashes if no connection)

Field strength averaged (not visible if no connection)

Call connection status (flashes if no connection)

Battery status of the handset

amHT i M ol hhaz0933aaxxa0



Fig. 1.22: 2nd line of the standard display in "Look Around Mode"

Fig. 1.23: 3rd line of the standard display in "Look Around Mode"

2nd line: Field strength and speech quality

speech quality display4 bars: (>54): ”perfect”: very good speech quality3 bars: (45-54): ”good”: good speech quality2 bars: (35-44): ”fair”: call interruptions may occur1 bar: (25-34): ”bad”: frequent call interruptions0 bars: (<25): ”lousy”: stable connection is no longer possible

Additional field strength display information:? : Single value from scan procedure (snapshot)+ : top measurement limit reached

Filtered field strength display (RSSI)

65A$$$$ perfecthaz0934aaxxa0

Status information:"idle": No activity"scan": Scan procedure for DECT carrier frequencies active"srch": Attempting to set up a connection to the selected RU"lock": Active connection to your RU present (locked)"ring": Test HA is being called by another test HA"call": Test HA is calling another test HA"conn": Test HA has a call connection to another test HA"loop": Test HA is in ”Loopback Mode”

3rd line: Status and supplementary information

Identity of the radio unit (00..3F)

Last 4 digits (hex) of the system IDLong-clicking 2 temporarily shows the complete system ID.

Location Area ID (0..3)

"Handover Mode":X: Handover switched offH: Handover switched on

lock:C000 0-03bXhaz0935aaxxa0

Battery status of the test RU: (only available with locked test HA)No display: Battery chargedb: Battery charge critical



Fig. 1.24: 4th line of the standard display in "Look Around Mode"

Detail Display of ”Connection Quality”

Pressing the ”i” key from the standard display takes you to the ”Connection quality” detail display. It contains additional connection information (except in "scan" and "srch" status) in the 2nd line:

Fig. 1.25: 2nd line of the ”Connection quality” detail display in "Look Around Mode"

4th line: Fox menu and supplementary information

Right Foxkey:">": Select next RU from the list"<": Select previous RU from the list(long-click ”>” switches to "<” and vice versa)

Left Foxkey:"scan": Start the scan procedure"stop": Cancel the scan procedure

stop 1/ 4 2haz0934aaxxa0

Number of found RUs during the scan procedure (information)

Dialled RU (information)

2nd line: Detail display of ”Connection quality”

Selected antenna of the test RU:”i”: Internal antennas, antenna diversity switched on”e”: External antennas, antenna diversity switched on”i1”: Internal antenna 1, antenna diversity switched off”e2”: Internal antenna 2, antenna diversity switched off”i2”: External antenna 1, antenna diversity switched off”e2”: External antenna 2, antenna diversity switched off

Field strength minimum of the last couple of measurements

65 52 29 c99+i2haz0937aaxxa0

Displayed when more than 99 CRC errors have been registered

Counter of the CRC errors (0..99) (CRC = Cyclic Redundancy Check)(can be reset with the ”#” key)

Field strength minimum since the connection was established(can be reset with the ”#” key)

Filtered field strength display (RSSI)



Detail Display ”Bearer Information”

Pressing the ”i” key again takes you to the ”Bearer information” detail display. Lines 3 and 4 in this display show the current values for "Traffic Bearer" and "Synchronisation Bearer". The values of the "Traffic-Bearer" are not visible until a call connection has been set up. The ”Connection quality” detail display in the 2nd line remains the same.

Fig. 1.26: 3rd and 4th lines of the ”Bearer information” detail display in "Look Around Mode"

3rd + 4th line: Detail display of ”Bearer information”

"Synchronisation Bearer":current carrier (c = carrier) and time slot (s = slot)

"Traffic Bearer":current carrier (c = carrier) and time slot (s = slot)

Left Foxkey:"scan": Start the scan procedure"stop": Cancel the scan procedure

"Synchronisation Bearer":Location area ID (0..3)

"Synchronisation Bearer":Identity of the radio unit (00..3F)

C000 t0-03 s0-04

scan c8s06 c9s02haz0938aaxxa0

"Traffic Bearer":Identity of the radio unit (00..3F)

"Traffic Bearer":Location area ID (0..3)

Last 4 digits (hex) of the system ID



Settings in "Look Around Mode"

Selecting a DECT System

1. In ”Look Around Mode” press the ”M” key repeatedly until "System" appears

2. Press Foxkey "System"

3. Use the Foxkey ”>” to select the system designation

4. Confirm with Foxkey "OK"

Tip:Long-click 1 to change the system.

Tab. 1.2: Significance of the system designation:

Note: The selected system is permanently saved and is maintained even after switching off the HA.

Scan Procedure:

After selecting the DECT system, the scan procedure is started by pressing Foxkey "OK" or Foxkey "scan". This generates a list of all visible RUs of the selected system:

• The list may have a maximum of 32 entries• The scan procedure takes about 10 seconds and can be cancelled with Fox-

key ”stop”.• All systems are scanned if the selected system designation is "X".• If the selected system designation is ”A, B, C, D or E”, only the RUs of the

corresponding systems are displayed.

Designation Icon Meaning Note

A, B, C, D A, B, C, D Systems of the valid HA log-ons

Only visible if the handset is registered in these systems

E E Saved system Visible only if a system was previously saved (see section ”Saving a System ID:”)

Test T Test system Contains only the visible test RUs in measuring mode

Xall X All systems Contains all visible RUs



• If the selected system designation is ”T”, only the visible test RUs are dis-played in measuring mode. All test RUs have the system identity ”0000:C000” and an RU identity of 01…08 (corresponding to the position of the HEX rotary switch)..

Status Display during the SCAN Procedure

During the scan procedure, the status information ”scan” appears before the system ID of the currently displayed RU. The question mark after the field strength display indicates a snapshot of the measurement. When the scan pro-cedure is completed, the status information changes to ”srch”. The HA attempts to set up a connection to the RU. If the connection is successful, the status information changes to ”lock”. The question mark disappears and the field strength display is refreshed every 0.5 sec.

Fig. 1.27: Display in ”Look around mode” across all systems (X)

Selecting an RU:

The first found RU is automatically displayed after starting the scan procedure. If more than one RU is found, another RU can be selected with Foxkey ”>” or ”<”.

Alternately, pressing digit keys 1..8 (for system T) or 1..9 or 0 for 10 (for all other systems) directly selects a specific RU from the list.1)

Saving a System ID:

After scanning all systems (X), the RUs of the different systems are listed unsorted. To display only the visible RUs of a particular system, the required system ID is saved under the system designation ”E” and then selected:

1. In ”Look-around mode” across all systems (X) press the ”M” key

2. Press Foxkey ”Store->E” (note: the menu item appears only after the scan procedure is completed)

1) Possible only with test HA

am X i M

65A$$$$ perfect

scan:8034 0-28 X

stop 1/13 >

haz0932aaxxa0

am X i M

65A$$$$ perfect

srch:8034 0-28 X

scan 1/13 >

amHX i M

65 $$$$ perfect

lock:8034 0-28 X

scan 1/13 >



3. Select an RU of the desired system with Foxkey ”>” or ”<”


5. Press Foxkey "System"

6. Select system designation ”E” with Foxkey ”>”


8. The scan procedure starts automatically and only the RUs with this system ID are displayed in the list.

Note:The selected system is permanently saved and is maintained even after switching off the HA.

Display Backlighting1)

During the measuring procedure it may be practical to have the display on the handset continually backlit. The backlighting mode can be set on the test HA via the menu.

1. Press ”M” in ”Look Around Mode” until "Light" appears

2. Press Foxkey "Light"

3. Use Foxkey ”>” to select the desired backlighting


Tip:Long-click 7 to go directly to this menu.

Note:The "always" mode should be selected only in exceptional cases; the battery capacity is quickly used up when the display backlighting is continually on.




Handover:

To facilitate measuring out a DECT system, the call transfer (handover) to another radio unit can be switched on and off. The status is displayed as ”X” or ”H” in the 3rd line in "Look Around Mode" (see Fig. 1.23). The setting is not stored. After entering "Look Around Mode", handover is always switched off.

1. Press the ”M” key in ”Look Around Mode” until "Handover" appears

2. Press Foxkey "Handover":The status changes from Off (”X”) to On (”H”)

3. Press Foxkey "Handover" again:The status changes from On (”H”) to Off (”X”)

Note:Because in a test system the test RUs do not run synchronously, no ”Connection handover” is possible.

Voice Connections via the test RU1)

If the selected system is a test system (T), voice connections can be set up as an acoustic check of the test RU. This is only possible with the test HAs, since it requires special HA software. It is advisable to connect the headsets to the test HAs for this purpose. This enables convenient simultaneous acoustic and visual checking of the speech quality.

Loopback Connection with a Test HA

A loopback connection is a special call connection with a test HA. The send path is looped back in the test RU to the reception path. This enables an acous-tic check of the speech quality (crackle interference etc.) with just one test HA.)

• Press "*": Loopback connection is set up

• Press "*" or the h” key: Loopback connection is cleared down




Call Connection with another Test HA

To be able to set up a call connection, both test HAs must be connected to the same test RU with ”lock” status.

• Call other test HA: Press "h" call keyThe status indicator changes to ”call” and the other test HA is called. On the called test HA the status indicator changes to ”ring”. If additional test HAs are connected to the same test RU, they also call.

• Answering the call: On one of the calling test HAs, press call key ”h”:The call connection is set up. On both test HAs the status indicator changes to ”conn”. The call on all other test HAs is stopped.

• Clear down call connection: On one test HA, press call key ”h” again

Switching Microphone On/Off

In a call connection with another test HA or in a loopback connection of a test HA, the microphone can be switched off and on:

1. Press ”M” repeatedly until "Micro" appears

2. Press Foxkey "Micro": Microphone is switched off and the symbol ”n” is displayed.

3. Press Foxkey "Micro" again: Microphone is switched on and the symbol ”n” disappears.

Switching Hands-free Operation On/Off

The hands-free operation can be switched on and off in a call connection with another HA. This has the advantage that the speech quality can be simultane-ously checked visually and acoustically:

1. Press the loudspeaker key: Hands-free operation is activated. The symbols ”o” and ”l” are displayed

2. Press the loudspeaker key again: Hands-free operation is deactivated. The symbols ”o” and ”l” disappear.

Notes:In the hands-free mode, the send path is switched through in a loud environment and the reception path is greatly attenuated. To prevent this, the microphone can be switched off also in the hands-free mode.In a loopback connection, the hands-free mode makes no sense (feedback or suppression of the signal).



Antenna Selection and Diversity1)

The test RU (like a SB-8ANT) has 2 internal antennas and 2 external antenna connections (see Fig. 1.1). Special coverage requirements can be satisfied with external antennas. Dual antennas, which support antenna diversity, are normally used. (See also "Using external antennas", page 16.) In exceptional cases, it may also be possible to use two separate external antennas that do not cover the same range. To measure out the individual coverage ranges, the antenna diversity can be deactivated for measuring purposes and one of the two external antennas selected as fixed.

Note:Operation with external antennas that do not cover the same range increase the probability of interference (minor drop-outs, drop-outs, etc.), since the fading effects cannot be counteracted.

Toggling Internal/External Antennas

If a test HA has a connection to a test RU, you can toggle between the internal and external antennas of the test RU. All connections of this test RU are then via the selected antennas:

1. Press the ”M” key repeatedly until "Antenna" appears

2. Press the Foxkey "Antenna"

3. Use Foxkey ”>” to select the desired antennas


The antenna selection (internal/external) is displayed on the test HA (see Detail Display of ”Connection Quality”, page 42) and on the test RU ("Flashing sequences of the pilot LED on the test RU", page 37).




Switching Antenna Diversity On/Off and Selecting the Antenna

If a test HA is in a call connection (loopback connection or connection to another test HA), antenna diversity can be deactivated and switched perma-nently to one of the two internal or external antennas. The current connection then uses only this antenna:

1. Set up a loopback or call connection

2. Press the ”M” key repeatedly until "AntDiv" appears

3. Press Foxkey "AntDiv"

4. Use Foxkey ”>” to select the desired antenna mode


To facilitate toggling between antennas 1 and 2, the Fox menu remains until the ”C” or ”M” key is pressed. The selected antenna mode is displayed on the test HA (see Detail Display of ”Connection Quality”, page 42).

Overview of the Menu Items in ”Look around mode”

Tab. 1.3: Menu items in ”Look around mode”

Menu Description Parameter Remarks

System Select the DECT systems (see page 44)

A, B, C, D, E, T, X

Store->E Saving a system ID (see page 45)

- • Available only with system ”X”

Antenna Switchover between internal and external antennas of a test RU (see page 49)

internal, external • Available only with test HA that has a connection to a test RU in measuring mode (locked).

AntDiv Switching antenna diversity on/off and selecting the antenna of a test RU (see page 50)

AntDiv. normal, AntDiv.off Ant1, AntDiv.off Ant2

• Available only with test HA that has a call connection to a test RU in measuring mode.

Light Backlighting of the display (see page 46)

off, auto, always • Available only with test HA• To conserve the battery, with

"always" the number block of the keypad is not back lit.

• The menu can also be activated by long clicking 7.

Handover Handover on /off (see page 47)

- • Status display X=off, H=on• ”Connection handover” with sys-

tem ”T” not possible

Micro Microphone on /off (see page 48)

- • Available only with test HA, avail-able with system ”T”



Keyboard assignment in "Look Around Mode"

The keyboard assignment (short or long key press) in ”Look Around Mode” is partially identical to normal HA operation and partially different.

Tab. 1.4: Short key press (”short-click”) in ”Look Around Mode”

Key Meaning Note

Foxkey left/right

Make menu selection, confirm selection, scroll in a list, etc.

M Display next menu item

C Return to previous menu or exit menu Available only with test HA

i Change between displays see Fig. 1.19

Call key Set up / clear down call connection to another test HA, clear down loopback connection

Available only with test HA under system ”T” (see page 47)

0..9 Under system ”T”: Switch to test RU 1..8, other-wise: change to corresponding RU from the scan list (0 corresponds to entry 10)

(see page 45)

* Set up loopback connection with test RU Available only with test HA under system ”T” (see page 47)

# Reset field strength minimum and CRC errors displays

Long-click ”#” also possible (see Fig. 1.25)

Loudspeaker key

Switch hands-free operation on/off Available only with test HA under system ”T” (see page 48)

Hotkey not available



Tab. 1.5: Long key press (”long-click”) in ”Look Around Mode”

Key Meaning Note

Foxkey left -

Foxkey right Change scroll direction(long-click ”>” switches to "<” and vice versa)

Not available in all menus

M not available (see page 39)

C Exit "Look Around Mode" (see page 39)

i - (see page 39)

Call key not available (see page 39)

0 see Tab. 1.6

1 Select next system (A, B, C, D, E, T, X) (see page 44)

2 Display complete system ID (see Fig. 1.23)

3 see Tab. 1.6

4 Exit "Look Around Mode" (see page 39)

5 Displays the SW version of the test software

5 + 1 Request ”Connection handover”

5 + 4 Request ”Bearer handover”

5 + 5 Displays the internal SW version

6 see Tab. 1.6

7 Go directly to menu for display backlighting Available only with test HA

8 not available

9 not available

* not available

# Reset field strength minimum and CRC errors displays

Also possible with short-click ”#” (see Fig. 1.25)

Hotkey not available



3.5.3.2 "Show Measurement Mode"

This mode is available without restriction with a standard HA as well as with a test HA. A prerequisite, however, is that the handset is registered on system A, B, C or D and is connected to a radio unit (locked).

Activating the ”Show Measurement Mode”:

1. Long-click key ”4”:The display switches for 7seconds to ”Show Measurement Mode”. Line 2 shows the field strength and speech quality (see Fig. 1.22); line 3 shows the ”Bearer information” detail display (see Fig. 1.26). The 4th line shows the information for switch-ing to the permanent display mode (”to keep test: LC#”).

2. Long-click ”#” within 7 seconds:The display remains permanently in ”Show Measurement Mode”. Lines 3 and 4 show the ”Bearer information” detail display (see Detail Display ”Bearer Information”, page 43)Note: Instead of Foxkey "scan", a "Connection handover" or a "Bearer handover" is also displayed (see Fig. 1.28).

3. Long clicking ”#” again switches the 2nd line to the ”speech quality” detail display (see Detail Display of ”Connection Quality”, page 42).Note: The information about whether the current radio unit is working with the internal or external antennas is not available in this mode.

4. Further long-clicks of the "#" key resets the field strength minimum displays and the counter of the CRC errors (see Detail Display of ”Connection Qual-ity”, page 42).

Exiting the ”Show Measurement Mode”:

Long-click 4 or long-click C

Keyboard assignment in "Show Measurement Mode"

The keyboard assignment (short-click or long-click) in ”Show Measurement Mode” is identical to normal HA operation with the exception of long-click 4 and long-click # (see the previous section for a description).



3.5.3.3 "Show Handover Mode"

A handover (HO) is a change from one radio unit (RU) to another (”Connection Handover”) or from one channel to another on the same RU ("Bearer Hand-over"). It is always performed when the field strength is too weak and at the same time a stronger signal is present. The change can take place during a call connection but also in the idle state of the HA. For this to take place, the HA must be registered on system A, B, C or D connected to a radio unit (locked).”Show Handover Mode” is primarily used for checking a system already in operation. It shows the handover behaviour of an HA moving between the cov-erage ranges of the installed radio units.

The handover can be visually indicated and/or acoustically signalled using a test HA or standard HA.

Configuring the "Show Handover Mode"

1. Long-click the ”M” key to access the configuration menu

2. Press the ”M” key repeatedly until "Test" appears

3. Press Foxkey "Test"

4. Press Foxkey "Show_HO"

5. Use Foxkey ”>” or ”<” to select the desired setting:”None”: no display, no signalling"Beep": handover is signalled acoustically"Disp": handover is displayed visually"Both": handover is signalled acoustically and displayed visually


As long as the HA is not switched off, the setting remains stored.

Visual Signalling on the Handset

If the setting "Beep" or "Both" is selected, every handover is signalled with short signal tones:

• low tone for a ”Connection Handover” to another RU• high tone for a ”Bearer Handover” on the same RU



Display on the Handset

If the setting "Disp" or "Both" is selected, the following display is visible for 7 seconds for every handover:

Fig. 1.28: Display of a handover during a call connection

Tip:The handover is signalled acoustically and/or displayed visually in ”Show Measurement Mode”. This enables checking the field strength before and after the handover. In this way the handover behaviour from one RU to the other can be observed with respect to field strength.

Keyboard assignment in "Show Handover Mode"

The keyboard assignment (short-click or long-click) in ”Show Handover Mode” is identical to normal HA operation. The temporary handover display can be prematurely terminated using the "C" key.

1st line: icons (see Fig. 1.21)

Handover display:H:b. successful "Bearer Handover"H:c. successful "Connection Handover"H:bf "Bearer Handover" failedH:cf "Connection Handover" failed

amHA i M h

65 $$$$ perfect

8034 t0-06 s0-01

H:c. c3s06 c2s08haz0939aaxxa0

2nd line: Field strength and speech quality (see Fig. 1.22)

3rd + 4th line: Detail display of ”Bearer information” (see Fig. 1.26)



4 Handset keyboard assignment (long-clicks)

In normal handset operation, long-clicking the following keys accesses addi-tional functions directly. These indications apply to Office 135/135pro and Office 155pro/155ATEX. Deviations are indicated by footnotes.

Tab. 1.6: Long-clicks on handsets in normal operation

See also:Descriptions of other key long-clicks (to simplify function operation) can be found in the Office User’s Guide.

Key Meaning

Foxkey right

In a list box: change scroll direction. Long-click ”>” switches to "<” and vice versa.

M Direct access to the configuration menu

C1) Switch handset on/off

0 The handset is switched off to save power. It is switched back on with the Connect key and the Foxkey. Once the handset is switched off, it cannot receive any more calls!

1 Switches over to the next radio system temporarily.

2 Indicates the radio system parameters (handset IPEI and radio system PARK). With each additional call the next radio system is indicated in each case if there are other logons.

3 Indicates the handset’s internal diagnostics.

4 Indicates the data of the valid radio unit (”Show Measurement Mode”)

5 Indicates the handset’s software version.

61)

1) Not available for Office 155

Indicates battery charge status and the type.

7 Indicates the PBX's software version.

8 Activates "semi" key lock. See Operating Instructions for details.

9 Activates key lock. See Operating Instructions for details.

* Switch dialling type DTMF on/off. See Operating Instructions for details.

# Menu for display contrast, display backlighting, area tone and overload tone. See Operating Instructions for details.

Hotkey Configuration mode for hotkey. See Operating Instructions for details.

5 + 3 Switch error messages on/off (first start value: off). Messages relating to the following errors cannot be switched on/off: HS logon error, incorrect location registration, no locatable radio unit, network, PBX or radio unit overload.

Handset keyboard assignment (long-clicks) 56


Index

AAntenna Selection . . . . . . . . . . . . . . . . . . 49

CCall connection . . . . . . . . . . . . . . . . . . . . 48Connections of the test RU . . . . . . . . . . . 37Control elements and connections . . . . . 37Control elements of the test RU . . . . . . . 37Coverage area . . . . . . . . . . . . . . . . . . . 9, 27Customer requirement . . . . . . . . . . . . . . . 21

DDiversity . . . . . . . . . . . . . . . . . . . . . . . . . . 49

EExternal antennas . . . . . . . . . . . . . . . . . . 16

FFunction test . . . . . . . . . . . . . . . . . . . . . . 31

HHandover . . . . . . . . . . . . . . . . . . . . . . 28, 47

IInstallation . . . . . . . . . . . . . . . . . . . . . . . . 33Interference factor . . . . . . . . . . . . . . . . . . 13

LLocation area . . . . . . . . . . . . . . . . . . . 11, 28Long-click . . . . . . . . . . . . . . . . . . . . . . . . 52Long-clicks . . . . . . . . . . . . . . . . . . . . . . . . 56Look Around Mode . . . . . . . . . . . . . . . . . 38

- Detail display of bearer information . 43- Detail display of connection quality . 42- Exiting . . . . . . . . . . . . . . . . . . . . . . . 39- Long-click . . . . . . . . . . . . . . . . . . . . . 52- Overview . . . . . . . . . . . . . . . . . . . . . 50- Settings . . . . . . . . . . . . . . . . . . . . . . 44- Short-click . . . . . . . . . . . . . . . . . . . . 51- Standard display . . . . . . . . . . . . . . . 40

Loopback connection . . . . . . . . . . . . . . . . 47

MMeasuring device ME-8 . . . . . . . . . . . . . .34Modes of operation . . . . . . . . . . . . . . . . . .38

OOverlap area . . . . . . . . . . . . . . . . . . . . . . .28

PPlanning . . . . . . . . . . . . . . . . . . . . . . . . . .20

RRadio characteristic . . . . . . . . . . . . . . . . .12Reception condition . . . . . . . . . . . . . . . . .16Relays (Repeaters) . . . . . . . . . . . . . . . . . .19Re-measuring . . . . . . . . . . . . . . . . . . . . . .33

SScan procedure . . . . . . . . . . . . . . . . . . . .44Show handover mode . . . . . . . . . . . . . . . .54Show measurement mode . . . . . . . . . . . .53System designations . . . . . . . . . . . . . . . .44

TTest handset . . . . . . . . . . . . . . . . . . . . . . .35Test kit . . . . . . . . . . . . . . . . . . . . . . . . . . .34Test radio unit . . . . . . . . . . . . . . . . . . . . . .36Topology . . . . . . . . . . . . . . . . . . . . . . . . . .10Traffic density . . . . . . . . . . . . . . . . . . . . . .29

VVoice connections . . . . . . . . . . . . . . . . . .47

Ascotel IntelliGate Telecommunication Systems

Documents

Transcript of Ascotel IntelliGate Telecommunication Systems