Paradyne 7976 User Manual

Hotwire 7976 M/SDSL Standalone Termination Unit with G.703 Interface

Installation Instructions

Document Number 7976-A2-GZ40-00

March 1999

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Select the following document:

Library → Technical Manuals → Hotwire DSL & MVL Systems.

7976-A2-GB20

Hotwire 7976 M/SDSL Standalone Termination Unit, with G.703 Interface, User’s Guide

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 Within the U.S.A., call 1-800-PARADYNE (1-800-727-2396)  Outside the U.S.A., call 1-727-530-8623

Installation Overview

Installation and configuration of the Hotwire 7976 Standalone Termination Unit consists of:

 Connecting power to the unit.  Connecting to the network.  Connecting to a DTE.  Connecting a system terminal.  Providing initial unit identity information or changing existing identity

information.

 Configuring your unit using internal switchpacks or using the Configuration

Edit menus.

Before you install the Hotwire 7976 Standalone Termination Unit, read the

Important Safety Instructions

Be sure to register your warranty at www.paradyne.com. Select

Support

→

Warranty Registration.

on page 22.

Service &

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Connecting Power to the Unit

If your package includes a power pack:

Plug the power pack into an ac outlet having a nominal voltage rating between 100–240 Vac. Connect the output cable of the power pack to the connector marked POWER on the rear panel.

If your package includes a direct-connection +24 Vdc power cable:

unit to an external dc power source as described in

Optional External +24 Vdc Power Source If you will use a –48 Vdc power supply:

Connect the unit to an external –48 Vdc

Connecting the Unit to an

power source as described in the documentation shipped with the power supply and power cable.

Optional Power Sources

Using the optional dc power cable, the unit is capable of operating on either a +24 Vdc power source, –48 Vdc single source battery, or –48 Vdc redundant source batteries (for power backup).

Connecting the Unit to an Optional External +24 Vdc Power Source

Using the dc power cable, the Hotwire 7976 Standalone Termination Unit is capable of operating on a +24 Vdc power supply.

 Procedure

To use the dc power cable:

1. Connect the green wire to a suitable ground.

2. Connect the orange wire to the +24 Vdc source.

3. Connect the white wire to the return.

4. Cut the black, red, and blue wires off at the outer insulation.

5. Plug the power connector into the 7976 Standalone Termination Unit.

Connect the

1 2 3 4 5 6

Black

Red

Green

White

Orange

Blue

+24 Vdc Power Supply Pinouts

March 1999

X X

Ground RTN

+24 Vdc X

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Connecting to the Network

 Procedure

To connect your unit to the network:

1. Connect one end of the supplied network cable into the rear panel DSL jack.

2. Connect the other end to your DSL network interface.

NOTE:

not

use a flat VF network cable as this may severely degrade the performance of the termination unit. Use only Cat 5 twisted-pair network cable.

Connecting to a DTE

The G.703 interface is either two BNC connectors (Transmit and Receive) for a 75-ohm unbalanced interface or an RJ48C, 8-position, unkeyed modular connector for a 120-ohm balanced interface. See the User’s Guide for specifications of the 120-ohm connector and cable.

Connecting to a System Terminal

Cables and Pin Assignments

An optional system maintenance terminal may be attached to your Hotwire 7976 Standalone Termination Unit through the modular jack on the rear panel. The system maintenance terminal allows you to view the status of the unit, and change configuration options. The terminal must be a VT100-compatible terminal or a PC running terminal emulation software.

 Procedure

To connect your unit to a system terminal:

1. Connect the 9-pin end of the terminal cable into a COM port on your PC.

2. Plug the other end into the modular jack on the rear panel.

3. Set the communication parameters on your PC or terminal to: — 9600 baud — 8 bit characters — no parity — 1 stop bit — no flow control

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Entering Identity Information

After accessing your unit for the first time, use the Change Identity screen to determine SNMP administrative system information that will be displayed on the Identity screen of the Status branch. To access the Identity screen, follow this menu selection sequence:

Main Menu→Control→Change Identity

Network Configuration

The following illustration shows several configurations including a network application using a 4-port Hotwire 8776 M/SDSL Termination Unit in a central office (CO). In this configuration, a frame relay switch and a router are connected, through the termination unit, to partner units supporting a host or router, and frame relay encapsulated or unframed data.

This figure also shows a standalone-to-standalone configuration using either another Hotwire 7976 M/SDSL standalone unit with a G.703 interface or a Hotwire 7975 M/SDSL standalone unit with an EIA-530A interface.

G.703

CO Site

Frame

Relay

Switch

Router

G.703

CO Site

LTU

7976 7976

G.703 G.703

CO Site

LTU

G.703

8776 T ermination Unit

in 8600 DSLAM

2.048 Mb over

SDSL

Premises (CP)

7976

G.703 7976

G.703

7976

Customer

E1 Host (Frame Relay Encapsulated

Data)

Router (Frame Relay Encapsulated

Router

NTU

Data)

7976 7975

G.703 EIA 530A

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In a DSLAM-to-standalone configuration:

 The devices synchronize without altering factory defaults, since the CO unit

defaults to LTU mode, and the CP unit defaults to NTU mode.

In a standalone-to-standalone configuration:

 One unit must be changed to run in LTU mode, since standalone units have

a factory default setting of NTU mode.

In both cases the clocking source may have to be altered depending on network requirements.

Choosing a Configuration Mode

You can make configuration changes either through a VT100-compatible terminal and the unit’s Configuration menus or by manually changing switches on the board. The unit comes configured to allow settings to be made through the Configuration menus.

Configuring the Unit Using the Configuration Menus

Use the Configuration menu to select, display, or change configuration option settings.

NOTE:

The 7976 Standalone Termination Unit is configured by default as an NTU. If you are using this unit as an NTU, configuration options may not need to be changed.

The 7976 Standalone Termination Unit has two sets of configuration option settings:

 The Current Configuration (the 7976 Standalone Termination Unit’s active set

of configuration options)

 The Default Factory Configuration (a read-only configuration area containing

the factory default configuration options)

To display configuration options, you must first load a configuration into the edit area. To load a configuration option set into the configuration edit area, follow this menu selection sequence:

Main Menu→Configuration (Load Configuration From)

Make a selection by placing the cursor at your choice and pressing Enter.

If you select . . . Then . . .

Current Configuration

Default Factory Configuration

Configuration Loader

The selected configuration option set is loaded and the Configuration Edit/Display menu screen appears.

The Configuration Loader screen is displayed allowing you to upload or download configurations from a TFTP server.

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Configuration Edit/Display

The Configuration Edit/Display screen is displayed when the current, customer, or default configuration is loaded. To access the Configuration Edit/Display screen, follow this menu selection sequence:

Main Menu→Configuration →Current Configuration

–

or –

Main Menu→Configuration →Default Factory Configuration

main/config/edit Hotwire

CONFIGURATION EDIT/DISPLAY

Network G.703 System Options Communication Port Management and Communication

––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– Ctrl-a to access these functions, ESC for previous menu M

ave

Model: 7976

ainMenu Exit

Select . . . To Access the . . . To Configure the . . .

Network Network Interface Options, Table 1 DSL network interface on

G.703 G.703 Interface Options, Table 2 G.703 interface. System Options System Options, Table 3 General system options of

the unit.

Communication Port

Management and Communication

Communication Port Options, Table 4 Unit’s COM port options.

 Telnet Session Options, Table 5  Communication Protocol Options,

Table 6

 General SNMP Management

Management support of the unit through SNMP and Telnet.

Options, Table 7

 SNMP NMS Security Options,

Table 8

 SNMP Traps Options, Table 9

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Table 1. Network Interface Options

Margin Threshold Possible Settings: –5db, –4db, –3db, –2db, –1db, 0db, 1db, 2db, 3db, 4db, 5db, 6db,

7db, 8db, 9db, 10db

Default Setting: 0db Determines the level, expressed in decibels, at which a signal-to-noise margin alarm

condition is reported.

Excessive Error Rate Threshold

Possible Settings: 1E–4, 1E–5, 1E–6, 1E–7, 1E–8, 1E–9 Default Setting: 1E–6

Determines the error rate at which an excessive error rate (EER) condition is recognized. The rate is the ratio of the number of CRC errors to the number of bits received in a certain period.

AutoRate (LTU only)

Possible Settings: Enable, Disable Default Setting: Disable

Specifies whether the DSL line will automatically train up to the best rate or be user selectable.

 AutoRate is only available when the standalone unit is configured as an LTU.

DSL Line Rate

Possible Settings: 400, 528, 784, 1040, 1552, 2064 Default Setting: 2064

Specifies the DSL line rate of the unit.

 DSL Line Rate is only available when the standalone unit is configured as an LTU

and AutoRate is disabled (unit is in fixed rate).

Peer IP Address (LTU Only)

Possible Settings: 000.000.000.001 – 223.255.255.255, Clear Default Setting: 000.000.000.000

Specifies the peer IP address for the NTU, to provide remote management providing the remote management link on the DSL loop.

 Peer IP Address is only available when the standalone unit is configured as an

L TU.

Circuit Identifier

Possible Settings: [ASCII Text], Clear Default Setting: [blank]

Uniquely identifies the circuit number of the transmission vendor’s DSL line for troubleshooting purposes.

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Table 2. G.703 Interface Options

Port Status

Possible Settings: Enabled, Disabled Default Setting: Enabled

Specifies whether the port can be configured and used to transmit and receive data.

Framing

Possible Settings: Framed, Unframed Default Setting: Framed

Specifies whether G.704 framing is used for the G.703 interface.

Line Framing (LTU Only)

Possible Settings: CRC4, noCRC4 Default Setting: noCRC4

Specifies the framing format to be used by the G.703 interface.

 Line Framing is only available when the standalone unit is configured as an LTU,

AutoRate is disabled, and the DSL Line rate is 2064 kbps. Otherwise the noCRC4 framing format is used. The NTU is automatically configured to match the framing format used by the L TU.

Line Coding

Possible Settings: AMI, HDB3 Default Setting: HDB3

Specifies the line coding format for the G.703 interface.

Time Slot 16 (LTU Only)

Possible Settings: Signaling, Data Default Setting: Signaling

Specifies whether the G.703 interface is used for voice or data.

Send AIS on Network Failure

Possible Settings: Enable, Disable Default Setting: Enable

Specifies the action taken on the signal transmitted to the G.703 when a valid signal cannot be recovered from the network interface (LOS or conditions OOF, AIS, or EER).

Primary Clock Source

Possible Settings: G.703, Internal Default Setting: Internal

Specifies where the unit will derive its timing from.

 Primary Clock Source is only available when the standalone unit is configured as

an L TU.

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