7000 Series - Overview. Wireless Overview Operating Bands Licensing & Guaranteed Service Regulations...
-
Upload
mervyn-tate -
Category
Documents
-
view
216 -
download
1
Transcript of 7000 Series - Overview. Wireless Overview Operating Bands Licensing & Guaranteed Service Regulations...
7000 Series - Overview
Wireless Overview• Operating Bands• Licensing & Guaranteed Service• Regulations• Guaranteed Bandwidth & 802.11• Range & link margin• Weather interference• Installation Issues• Typical Applications• Main Customer References
Operating Band - Actual
• 2.4GHz - LAN, 2Mbps, 8Mbps & 4x2Mbps wireless modems - only world-wide standard
• Good Range with Constant Throughput
• Broadband operation
• Interfaces - G.703, X.21 & V.35
• Probot 7000-2
Operating Band - Future
• 5.8GHz - next standard operating band
• 2Mbps, 8Mbps & 4x 2Mbps (16x 2Mbps) wireless modems
• Good Range with Constant Throughput
• Broadband operation
• Standard G.703, X.21 & V.35 interfaces
Licensing Issues• Unlicensed operation
– No Regular Fees - one off cost to install– No license application -reduced time to installation– Possible interference requiring link adjustment
• Licensed operation– Yearly license fees - ongoing costs– License Application - waiting time to install– Guaranteed service - reduced chance of interference
Regulations
• ETSI Standards - ETS 300-328
• 2400MHz to 2483.5MHz - 83.5MHz of BW
• Direct Sequence Spread Spectrum & Frequency Hopping Spread Spectrum
• 100mW Emitted Isotropic Output Power– Actual power delivered to the output of the
Transmit Antenna - ETSI limit
Bandwidth Issues
• IEEE802.11 Based products
– High Overheads on 11Mbps (Bandwidth) link
– Actual Data Throughput 2.5 to 3.5Mbps
• Probot Design
– Low overheads & Guaranteed Constant 4x 2Mbps Bandwidth and Throughput
Comparison between 802.11b System and 7000-2 System
0
2
4
6
8
10
12
Distance 1.5 2.5 3 4.5 6 7.5 9
Distance [Km]
Ban
dw
idth
an
d T
hro
ug
hp
ut
[Mb
ps]
Bandw idth 802.11b
Throughput 802.11b
Bandw idth 7000-2
Throughput 7000-2
Range Issues• ETSI Standard 100mW
– 24dBi Rx & 14dBi Tx Antennae – 10 Km.
• Standard link margin– No performance degradation for weather attenuation
(even with heavy fog > 50m visual range)– fluctuation in RF noise floor– Working temperature between -35ºC and +70 ºC does
not imply in performance (RF head)– link works error free
• Repeaters allow error free - transparent extension of a link (up to 90 Km.)
Installation Issues• LOS• Clearance
Installation Issues• LOS• Clearance
Site “A”Site “B”
Installation Issuesno clean Line of Sight
Site “A”Site “B”
Installation Issuesclean Line of Sight
Site “C”
7000 Series - Overview• Wireless Modems & Multiplexers
– Wireless Local Loop (WLL) applications
– Direct sequence Spread Spectrum (DSS)
• Operates in 2.4GHz S-Band Range
– Licence free Band in Europe & Most Countries
– Requires Line of Sight for Operation
– ETSI (100mW) or FCC (1W) versions• Performance - (without repeaters)
– up to 10km (ETSI) or up to 45km (FCC)
7000 Series• Main Technical Benefits
– Guaranteed Constant Bandwidth– Enables High Quality voice links:
• Point-to-Point <3ms Tx delay (RF head-to-RF head)• Point-to-Point with 1 Hop <5ms Tx delay (each hop
adds approx. 2ms Tx delay)
– Easy & Quick to Install– Highly Reliable, Robust & Proven Technology– Secure Transmission
• Signal is close to noise level
7000 Series7000-2 4x 2Mbps Wireless Modem• Interface Options
– 4x E1 - 2Mbps G.703– 4x X.21/V.11 - nx64Kbps to 2048Kbps– 2x E1 and 2x X.21/V.11– 1x E2 - 8Mbps G.703
• Status Indicators– Rx, Tx, Error, Sync, Remote Alarm & Power
• Link Management - via Menu driven LCD Display
• Frequency Range - 2400 to 2483.5Mhz• Spreading Code - CCK
7000 Series7000-Series Specification• Output (ETSI) - 100mW (EIRP)
• Receiver RF Sensitivity -78dBm @ BER 10-9
-84dBm @ BER 10-6
-86dBm @ BER 10-3
• Processing Gain - 10dB minimum• MTBF - 55,000hrs - Mil Std 217E
• Environmental RF Head -35oC to +70oCBase Unit 0oC to +55oC
• Power Supply +24 volt DC at 45 watt
EIRP - Emitted Isotropic Radiated Power
Probot Advantages• Guaranteed Constant Bandwidth
• Fibre Link between base unit & RF Head1. Provides Electrical Isolation - Base Unit protected from
lightning strike surges2. No loss of link budget power (no signal attenuation)3. Extends permissible distance between RF & Base units over
conventional systems (up to 2 Km. With Multimode Fiber link between RF Head and Base Unit)
• Voice Quality1. <3ms Transmit delay allows high quality voice links to be
implemented as opposed to systems using MAC chips (802.11b Systems)
Probot Advantages
• Zero Error Rate– 7000-2 tested for 10-9 or better error rates over 10km
• Support & Service– Very low product return rates– Easy to set up and install– Rapid response technical support
7000 Series7000-2 Typical Configuration
4 x 2048kbps @ up to 10km ETSI
or 45km FCC
4 x E1
24 VoltsDC input
4 x E1
24 VoltsDC input
RxAntenna
RxAntenna
RF HeadUnit & TxAntenna
Rack Mounted
orStandalone Base Unitswith LCD
Optical cables for
data transfer &electrical isolation
RF HeadUnit & TxAntenna
Low LossConnecting
Cable
7000 Series - Applications
7000-1
PABX
7000-1
MUX
Antenna Antenna
E1
PublicNetwork
Phone
Fax
Computer
E1
32 ChannelsPrivateFacilities
Voice
7000 Series - ProjectsRapid Deployment of Voice Services in Somalia
Main PSTNNetwork
7000-2
PABX sor Switch
4 x E1
PublicNetwork
7000-2
Mitel Switch
Antenna Antenna
4 x E1120 PSTNChannels
PrivateFacilities
Large CityMain
Exchange
Remote townsOutlying regions
Wireless Transmission - no delays forexcavation to lay cables. Distances
of up to 63km achieved with the useof repeaters or 1.2m antenna.
7000 Series
PABXPABX P 7000 P-7000 E1
PABX to PABX
Connections via a Mux
E1 P 7000 P 7000 MUX MUX
Router
Digital Switch
AnalogSwitch
PABX
Router
Digital Switch
AnalogSwitch
PABX
• The Probot 7000 series is transparent to the content of the E1 signal.
• Any configuring of the channels within the E1 stream must be controlled by the connected PBX or Multiplexor
Connection Combinations
Product Proposition - Summary• Robust technology offering excellent quality voice
• A full E1, E2, 4xE1 or 4x2Mbps signal with 10 km range and ETSI/FCC compliant
• Fast easy set-up for basic configuration without highly skilled RF installation engineers.
• Modular product platform allows easy & lowcost installation of the radio components without compromising range performance
7000-2 Customer ReferencesBritish Telecom
T MobileMannesman - Vodaphone
MitelSiemens
UK PoliceSwiss Police
UK Ministry of DefenceNATO