Paradyne Hotwire 7976 User manual

7976-A2-GZ40-00 March 1999

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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Complete documentation for this product is available at www.paradyne.com.

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Hotwire DSL & MVL Systems.

Select the following document:

7976-A2-GB20

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

User’s Guide

To request a paper copy of a Paradyne document:

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

on page 22.

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

Service &

Support

→

Warranty Registration.

2 7976-A2-GZ40-00

March 1999

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:

Connect the

unit to an external dc power source as described in

Connecting the Unit to an

Optional External +24 Vdc Power Source

If you will use a –48 Vdc power supply:

Connect the unit to an external –48 Vdc

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.

Ground

RTN

+24 Vdc

Black

Red

Green

White

Orange

Blue

99-14158-02

+24 Vdc Power Supply Pinouts

7976-A2-GZ40-00 March 1999

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

Cables and Pin Assignments

the User’s Guide for specifications of the 120-ohm connector and cable.

Connecting to a System Terminal

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

4 7976-A2-GZ40-00

March 1999

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.

Frame

Relay

Switch

Router

E1 Host

(Frame Relay

Encapsulated

Data)

98-16093

Router

(Frame Relay

Encapsulated

Data)

G.703

Router 2.048 Mb

over

SDSL

G.703

8776 Termination Unit

in 8600 DSLAM

CO Site 7976

7976

Customer

Premises (CP)

7976 7976

NTU

CO Site

LTU

G.703 G.703

G.703

7976 7975

NTU

CO Site

LTU

G.703 EIA 530A

7976-A2-GZ40-00 March 1999

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 The selected configuration option set is loaded and the

Configuration Edit/Display menu screen appears.

Default Factory

Configuration The selected configuration option set is loaded and the

Configuration Edit/Display menu screen appears.

Configuration

Loader The Configuration Loader screen is displayed allowing you to

upload or download configurations from a TFTP server.

6 7976-A2-GZ40-00

March 1999

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

ÎÎ

main/config/edit Hotwire

Model: 7976

CONFIGURATION EDIT/DISPLAY

Network

G.703

System Options

Communication Port

Management and Communication

–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––

Ctrl-a to access these functions, ESC for previous menu MainMenu Exit

Save

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

Network Network Interface Options, Table 1 DSL network interface on

the unit.

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

Management

and

Communication

Telnet Session Options, Table 5

Communication Protocol Options,

Table 6

General SNMP Management

Options, Table 7

SNMP NMS Security Options,

Table 8

SNMP Traps Options, Table 9

Management support of the

unit through SNMP and

Telnet.

7976-A2-GZ40-00 March 1999

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

LTU.

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.

8 7976-A2-GZ40-00

March 1999

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 LTU.

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 LTU.

7976-A2-GZ40-00 March 1999

Table 3. System Options

DSL Mode

Possible Settings: LTU, NTU

Default Setting: NTU

Controls whether the unit is configured as a control unit or tributary unit.

NOTE: Changing this option will reset the card.

Test Timeout

Possible Settings: Enable,Disable

Default Setting: Enable

Allows tests to end automatically. The feature should be enabled when the unit is

remotely managed, so that control can be regained after a test is accidentally executed.

Test Duration (min)

Possible Settings: 1–120

Default Setting: 10

Number of minutes for a test to be active before automatically ending.

Test Duration (min) appears when Test Timeout is enabled.

G.703 Line Termination

Possible Settings: 75 ohms, 120 ohms

Default Setting: 120 ohms

Specifies the impedance of the G.703 interface

Table 4. Communication Port Options (1 of 2)

Port Use

Possible Settings: Terminal, Net Link

Default Setting: Terminal

Specifies how the communications port is to be used.

Port Type

Possible Settings: Asynchronous, Synchronous

Default Setting: Asynchronous

When Port Use is set to Net Link, Port Type controls whether the communication port

will be asynchronous or synchronous.

Data Rate

Possible Settings: 9.6, 14.4, 19.2, 28.8, 38.4

Default Setting: 9.6

Specifies the communication port baud rate.

Character Length (Terminal Use Only)

Possible Settings: 7, 8

Default Setting: 8

Determines the character length of the communication port.

10 7976-A2-GZ40-00

March 1999

Table 4. Communication Port Options (2 of 2)

Parity (Terminal Use Only)

Possible Settings: None, Odd, Even

Default Setting: None

Specifies the parity of the communication port.

Stop Bits (Terminal Use Only)

Possible Settings: 1, 1.5, 2

Default Setting: 1

Specifies the number of stop bits for the communication port.

Ignore Control Leads (Terminal Use Only)

Possible Settings: Disable, DTR

Default Setting: Disable

Specifies whether DTR is used.

Possible Settings: Enable, Disable

Default Setting: Disable

Specifies if an ID and password are required to access the asynchronous terminal

interface on the communication port. Login IDs are created with a password and access

level.

Port Access Level (Terminal Use Only)

Possible Settings: Administrator, Operator

Default Setting: Administrator

Specifies the highest level of access allowed when accessing an ATI session through a

Telnet session.

Inactivity Timeout (Terminal Use Only)

Possible Settings: Enable, Disable

Default Setting: Disable

Provides automatic logoff of a Telnet session.

Disconnect Time (Minutes) (Terminal Use Only)

Possible Settings: 1 – 60

Default Setting: 5

Number of minutes of inactivity before the session terminates automatically. Timeout is

based on no keyboard activity.

Disconnect Time (minutes) appears when Inactivity Timeout is enabled.

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