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DN2 TRAINING OVERVIEW

ROB WHITE

Tel +44(0)7771 821908

Email: robert.white@magdalene.co.uk

Course structure

•Introductions

•2M Frame Structure

•Sub rack and Power

•DN2 installation and configuration including tables

•MSTE and DN2 manager

•Open forum and wash up

Workshop Program

E1 Transmission Format

• A Frame;

• An E1 system consists of 32 time slots which contain the 64 kbit/s consecutive samples. This is called a frame.

• The Transmission Rate;

• When combined together 32 time slots x 64 Kbits/s = 2048 Kbits/s which is the speed of the E-1 transmission system.

• ITU-T Specifications;

• ITU-T Rec. G.703

– Bit rate: 2048 Kbit/s

– Line Code: HDB3 (high density bipolar 3)

• Time Slot 16 : Frames 2 through 15 are the same as frame 1• Time Slot 0: Even number frames 2 through 14 are the same as frame 0• Time Slot 0: Odd number frames 3 through 15 are the same as frame 1

1 = bit set to 1 0 = bit set to 0 1/0 = speech / signalling (varying data) X = unassigned bit

(normally set to 1)

10 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Multiframe (16 frames)

Frame 0 (32 Time Slots)10 2 3 4 5 6 7 8 9 101112131415 1716 1819202122232425262728293031

Frame 1 (32 Time Slots)10 2 3 4 5 6 7 8 9 101112131415 1716 1819202122232425262728293031

Time Slot 0 (8 bits)

0X 0 1 1 0 1 110

10

10

10

10

10

10

10

Time Slot 1 Speech (Ch. 1)

Time Slot 16 (8 bits)

00 0 0 X 0 X X

Time Slot 0 (8 bits)

1X 0 X X X X X

Time Slot 16 Signalling Bits10

10

10

10

10

10

10

10

SpeechCh. 1-15

SpeechCh. 16-30

SpeechCh. 1-15

SpeechCh. 16-30

Frame

Time Slot

Frame Alignment

Word

Multi-Frame

Alignment Word

Not-Frame alignment word

A B CD A B CD

ITU-T Rec. G.704

• diagram illustrating how CAS information is sent.

2M Frame

• Diagram of the E1 frame.

Questions?

DYNANET PRODUCTS

DM2

DB2

DN2

Dynacard Bus - Core of DYNANET Nodes

VF SUB

Dynacard bus

VF DCLOOP

VF E&M

DATA 0..19.2k

DATA 48..64k

DATA nx64k

ISDN

ILT (HDSL)

nx64k G.704

ADPCM

DN2/DB2/DM2

N x 2M

PIA Replacement Tips

• Can not be managed by MSTE• Always check strapping of removed unit and change where different on

replacement unit• ON/OFF switch is physically locked into ON position by a retaining bar. However

it is a toggle type and therefore it is possible that it has ‘tripped’ to the OFF state while physically remaining in the ON position. Releasing from the retaining bar and resetting trip is obtained by physically moving position to OFF and back to ON.

NokiaDynaMech DC/DC Rack powered

Power Supply RPSAT73880.01

Sub Rack T37870.01

RPM 37881.01Alm 37886.01

NDA 37884.01

DC -48V

NokiaDynaMech DN2 shelf

T37882.01 NDM DC Unit (NDU)

DC -48V or 240 V DC

Sub Rack T37871.01

T37883.01 NDM AC/DC Unit (NAU)

Power Supply RPSAT73880.01

NDA 37884.01

Questions?

 

• Operation of service LEDs

• The red service LED of the MCU is lit when there is a serious fault in the equipment. If the MCU is powered up and the red LED still stays on, the unit should be replaced.

• The red LED on a DYNACARD (PIU) unit indicates that either there is a serious fault in the unit or the unit has not been added to the equipment configuration.

• Note: The red LED of any unit is lit when an external power supply fails to provide the operating voltages required.

• The yellow service LED is lit when the unit has detected a fault outside the equipment (the incoming signal may be faulty, for example). Some of the services may still be functioning quite normally and further actions are needed for locating the fault.

• The green service LED is lit when the unit is accessed by the Service Terminal or MSTE, or the Nokia DCNA

• Connection to the DCNA does not activate the green LED in all cases.

Alarms and LEDs

2MMUX

DN2

2MMUX

LOSLFA

LMFA

FEA/RDI

AIS

2MMUX

2MMUX

DN2

8MMUX

8MMUX

DN2

NO ALARMON 8M LINK

2MMUX

2MMUX

DN2

8MMUX

8MMUX

DN2

LOSAISAIS

AIS AIS AIS

FEA/RDI

FEA/RDI

FEA/RDI

LOSLFA

LMFA

PDH Alarms

Service Terminal Overview

Nokia TC21700 Service terminal (ST)

•Used to make configuration changes onNokia Dynanet equipment (Network Element – NE)

•“MODE” key to setup ST or check battery charge etc.

•“OBJ” key to connect to the equipment:Connect cable to SI (Service Interface) on NEObj2,address to connect properlyOR as a last resort (ensuring no other management connections)Obj7, Connect on default address 4095

•“TOP” key, once connected to NE to access NE’sconfiguration menu

•Use the menu structure to show configuration.

•Menu differs between different types of card. •All service menus shown in the relevant Nokia manual

As you can see from above the DN2 NM gives you a shelf layout of the Data Cards.MSTE is essentially the mml tool you will use to switch on/off channels, change settings etc.

MSTE GUIDN2 Node Manager GUI

Node Managers

Nokia MSTE 4.3

•PC based Service Terminal Emulator.

•More flexible and user friendly interface

•Uses same menu structure as Service Terminal

•Connects Via PC Com Port(with appropriate cable)

•Utilises Q1 connection tool and GCS Database

MSTE (Macro STE) overview

Questions?

MSTE Saving card configurations

Saving the Dynacard set up data to file using MSTE

•Card data saved individually•Files saved as with .STD Extension•Files saved in C:\Program Files\Nokia\Mste\data

MSTE Restoring card configurations

Restoring the Dynacard set up data to file using MSTECard data saved individually•Files saved as with .STD Extension•Files saved in C:\Program Files\Nokia\Mste\data

DN 2 - DYNAMIC NODE EQUIPMENT

• Consists of a control unit (CU), a bus power unit (BPU) and interface units (IU2). The BPU- and the IU2-units can be duplicated

• Direct data or speech interfaces provided by DYNACARD units

• n x 8 kbit/s, n x 64 kbit/s, 2 Mbit/s switching

• 1...40 x 2 Mbit/s (G.703/G.704) capacity

2M, G.703V.11

2M, G.704

2M, G.7042M, G.703

ISDNV./RS/X

V.F.

CU BPU IU2 IU2 CH

PIAIU2IU2IU2IU2IU2IU2IU2IU2IU2IU2

BPU

CU

• DN2 - Dynamic Node• Three-in-one node

– cross-connect– drop-insert– voice/data multiplexer

• Maximum capacity 40 x 2M• Several efficient ways to protect equipment

and/or signal route• Direct data or speech interfaces provided

by DYNACARD units• n x 8 kbit/s, n x 64 kbit/s, 2 Mbit/s

granularity• Used in mobile and fixed networks

2M, G.703V.11

2M, G.704

2M, G.7042M, G.703

ISDNV./RS/X

V.F.

DN2

DN2

PABX

DB2

DB2

DB2

DM2

DM2

DM2

DM2

PABX

NMS

DN2

Nokia DN2 Multiplexer

Units

DN2 consists of the following units:

• a control unit (CU)

• Bus Power Units (BPU or EBPU)

• Interface units (IU2)

• DYNACARD channel units

• DN 2 Mechanics and Backplane

IU2

IU2

IU2

IU2

IU2

IU2

IU2

IU2

IU2

IU2

CH/VF

CH/DIU

CU

BPU

PIA

IU2

Control Unit (CU)

• Same HW as in DM2• Main functions:

• Alarm database

• Service interface

• Dynacard bus

• Synchronization interface

• Configuration management

DC/DC

Control

Service InterfaceAux. Data Channel I/F

2M Interface

Meas. Interface

Dyna-CardBusI/F

Sync. Interface

Alarm Interface

DN2 CU Jumpers

VN5 Connected

VP5 Dis-connected

VNM Connected

CU Voltage Settings

Interface Unit (IU2)

• Main functions:• MUX/DEMUX 2M signal

• Statistics and faults of 2M signals

• Cross-connection

• Synchronization

DC/DC

Control

Aux. dataChannel I/F

2M Interface

Meas. Interface

Cross-Connection

FieldDN 2BusI/F

2M Interface

DN2 IU2 Jumpers

Disconnect VP5

IU2 Voltage Settings

(Extended) Bus Power Unit ((E)BPU)

• Bus power functions:

• +2 V to DN 2 cross-connection busses

• +5 V and -5 V to Dynacard bus• Extension functions:

• DN 2 bus extension

• Some DYNACARD bus signals, required by IU2s, also connected to other sub rack

• Duplication

• Two (E)BPUs can exist in a sub rack, one feeds the upper DN 2 bus and the other the lower bus

DM2 Extension interface(Only in EBPU)

DN 2 Extension Interface(Only in EBPU)

ControlBlock

PowerSupplyBlock

DN2 BPU Jumpers

Assuming EBPU protection not used

Use Option A

Connected

Dis-connected

BPU (EBPU) Voltage Settings

Configuration rule and suggestions

• IU2 always in slot 1 and in slot 17• IU2s in sequential slots• BPU/EBPU in the rightmost slot, if PIA not used, otherwise PIA in the rightmost

and BPU/EBPU next to it.• One CU for one node next to BPU/EBPU• Channel units between IU2s and CU

IU2

IU2

IU2

IU2

IU2

IU2

IU2

IU2

IU2

IU2

IU2

CH/VF

CH/DIU

CU

BPU

PIA

Plug-In -Units IU2 Interface unit 2x2Mbit/s CU Control Unit (E)BPU Bus Power Unit

Optional VF units Data units

DN2BUS1

DN2BUS2

IU2

(E)BPU

IU2

CU

.

.

.

.

.

.

DYNACARDBUS

VF-UNIT

DATA-UNIT

2 Mbit/s

2 Mbit/s

2 Mbit/s

2 Mbit/s

DN 2 - BLOCK DIAGRAM

2 Mbit/s

2 Mbit/s coax physical front connection

Questions?

DN2 Branching

• The DN 2 uses Tables to set up communications. These tables consist of different branches to allow this. the following are common branching types used within connect:

• Ordinary through connections (B-type)• Digital common channels (C-type)• Loopback (L-type)• Protection switch (Y-type)• Mask (M-type)• Examples:-

1 2

B2 Branch

3

1

2

VF

Site A DN2

To Site B

To Site CY Branch

• Always Default unit Top 6,6,121 RET• Install All Units Top 6,2,0• Set Q1 Address & Baud Rate• Set up Synch Plan• Set up Ports for MF Use, CRC etc• Is Dynacard bus being used ? (If No the Dynacards can`t be used)• Clear alarms using local loopback`s where possible.• Set up Dynacards & Ports and activate channels• Add cross-connects in DN2 Tables• Check Dynacard circuits work locally (where possible) around a 2 Mg Loop before extending.• Backup up DN2 Tables after new circuit additions & removals• Perform routine SW backups of DN2`s.

DN2 Commissioning Tips

DN2 Manager

Connect Send

Connect to DN2 Node

1. Open DN2 Manager from the start menu or from a desktop shortcut.

2. Select the ‘Connect’ button to open the ‘Nokia connection tool’ window.

3. Select the type of connection and enter the address of the DN2 to connect to.

DN2 Manager connected

Once connected to the DN2 node, the manager should look similar to this.

Any installed cards will be shown.(BPU/EBPU or PIA are not shown)

Synchronization

To check/set synchronization select the synchronization button.

The synchronization window will open.

Here you can set the priority list for the timing sources.

Send to Node

Any changes made to settings within the DN2 Node Manager must be sent to the Node for the settings to come into effect.

This is done using the ‘Send to Node’ button.

Until this is done the settings are only be stored in the Node Manager.

Port Settings

To check/set IU2 Port setting select the ‘Ports view’ button or ‘Configure…Ports view’ via the menu bar.

The settings for all IU2 ports that are installed will be displayed.

Double click inside a ports column to change settings.

Changing Port settings

From this window the setting for the individual port can be set.The interface can be brought in/out of use and any TS0 settings for embedded management or Loop synchronization set.

Questions?

Select a Table to add cross connects

To add/view cross connects we need to select a Table to edit.

Open the ‘Connection Tables view’.

To make the cross connects part of the live network then the ‘Activated’ table must be edited. Double click on the table to edit

Cross connects ‘Connections View’

The cross connects for that table will be displayed in a list.

Cross connects ‘Graphical View’

A graphical view of the cross connects can be seen by selecting the ‘Graphical connections view’ button

Adding cross connects

A new cross connect is done by selecting the button for the type of cross connect you wish to set. B C D Y

B Type Cross Connect

The B type cross connect window.

The Connection Point window

Y2M Type Cross Connect

A Y2M connection is used when setting protected routes for circuits.

Conditions are set to decide on how the active link is decided

C Type Cross Connect

The C type cross connect window.

C0 = Point to multipointC2 = Multipoint to multipoint

Alarms

By selecting the ‘Alarms view’ button a list of any alarms on the DN2 will be displayed, including those of any Dynacards that are installed.

‘Save as’ function

The ‘Save as’ function is used to save cross-connect/port settings made on the DN2 and allows Off-line configuration with the node manager.

Open a saved configuration file

To open a previously saved configuration select the ‘Open’ button and select the ‘.dn2’ file for the saved node.

Off-line Configuration

‘File Connection’ displays in the manager window and the cursor displays ‘file’ to show that you are configuring from file.

Backup the DN2 Node

The backup facility allows us to save the complete configuration of the DN2 node (including Dynacard settings) and restore it to a new or repaired node in a catastrophic incident.

Restore the DN2 Node

The Restore facility allows us to restore the complete configuration of a DN2 node to a new or repaired node.

Questions?

DN2 Y Branching

Y-Branch-Order Of Events-DN2 A•Allocate A-End Port And Time Slot For VF Circuit (Site A)

•Choose Primary Route Port And Time Slot

•Choose Secondary Route Port And Time Slot

•Set Conditions on Primary Route (2 Conditions Must be Set)

•Set Masks (If Required…These give full control)

•Repeat All Of the above for DN2 B (Site B)

VF A End

DN2 A

VF B End

DN2 B

Port 1 TS=1

=Primary Route

=Secondary Route

Port 1 TS=1

Primary Route Port 2 TS=1

Condition 2 and 3

Secondary Route Port 3 TS=1Secondary Route Port 3 TS=1

Primary Route Port 2 TS=1

Condition 2 and 3

Topology

Xxxxxxxx-xx0x

Xxxxxxxx-xx0x

Mask

Mask

DN2 Site A

Conditions & Masks Conditions & Masks

Port & TS Port & TSPrimary Route

Protecting Route

DN2 Site A-Conditions

DN2 Site A

VF A-End

DN2 A

VF B End

DN2 B

Port 1 TS=1Port 1 TS=1

Primary Route Failure

•At DN2 A and DN2 B------Bit C = xx1x, Due to Loss of 2 Meg(Failure,Condition3)

•As the condition 3 has been Met, The circuit Is Switched to the Secondary Route !

xTraffic Flow

Port 2 TS=1

Port 3 TS=1

Port 2 TS=1

Port 3 TS=1

VF A-End

DN2 A

VF B-End

DN2 A

Port 1 TS=1Port 1 TS=1

Revert to Normal Operation

•Once Primary Port Comes Back into Normal Operation, Bit c will once again be 1000 (abcd)

•This will satisfy condition 2 and therefore circuit will switch back to the Primary Route.

Traffic Flow

Port 2 TS=1

Port 3 TS=1

Port 2 TS=1

Port 3 TS=1

Questions?

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