Paradyne Hotwire 7975 Manual de usuario

7975-A2-GZ41-00 March 1999

Hotwire7975-A1 M/SDSL Standalone Termination Unit

Installation Instructions

Document Number 7975-A2-GZ41-00

March 1999

Product Documentation on the World Wide Web

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

Select

Library

→

Technical Manuals

→

Hotwire DSL & MVL Systems.

Select the following document:

7975-A2-GB20

Hotwire 7975 Standalone Termination Unit 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7975 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 7975 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 7975-A2-GZ41-00

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 +24 Vdc 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.

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

Use the following procedures only if you want to use the +24 Vdc power

cable.

Using the dc power cable, the Hotwire 7975 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 Termination Unit.

Ground

RTN

+24 Vdc

Black

Red

Green

White

Orange

Blue

99-14158-02

+24 Vdc Power Supply Pinouts

7975-A2-GZ41-00 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.

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 the DTE

The Hotwire 7975 Standalone Termination Unit connects to Data Terminal

Equipment (DTE) using a 25-pin EIA-530-A interface. Depending on the cable

used, the interface can be adapted to an X.21, RS449, or V.35 interface. See the

User’s Guide for more information.

Ferrite Choke

Procedure

To install the ferrite choke onto the DTE cable:

1. Open the ferrite choke and place it around the cable as close to the cable

connector as possible.

2. Close the two halves around the cable and snap the choke shut, pressing

down on the plastic latch to secure it in place.

3. Add a tie wrap (not included) as shown to prevent the ferrite choke from

slipping down the cable.

97-14820-02

Ferrite Choke

Plastic

Latch

Connector

End

Tie

Wrap

CAUTION:

All ferrite chokes that are supplied must be installed following these

instructions to ensure compliance with FCC Part 15, VCCI, and

CISPR22 rules.

4 7975-A2-GZ41-00

March 1999

Connecting to a System Terminal

An optional system maintenance terminal may be attached to your Hotwire

7975 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

Press Enter from your terminal or PC to activate the Main Menu for the attached

unit. The system runs diagnostics and status checks. After a few moments, the

Main Menu or Logon screen appears on your terminal.

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 Card Identity screen, follow

this menu selection sequence:

Main Menu

→

Control

→

Change Identity

7975-A2-GZ41-00 March 1999

Network Configuration

The following figure shows several configurations including a network application

using a 4-port Hotwire 8775 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. The figure also shows a possible

standalone-to-standalone configuration.

Frame

Relay

Switch

Router

E1 Host

(Frame Relay

Encapsulated

Data)

98-15938

Router

(Frame Relay

Encapsulated

Data)

V.35

Router 2.048 Mb

over

SDSL

V.35

8775 Termination Unit

in 8600 DSLAM

CO Site 7975

7975

Customer

Premises (CP)

7975 7975

Customer

Premises

NTU

CO Site

LTU

V.35 V.35

Sample M/SDSL Configurations

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.

6 7975-A2-GZ41-00

March 1999

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

You can use the Configuration menu branch of the unit to display or change

configuration option settings.

The Hotwire 7975 Standalone Termination Unit has two sets of configuration

option settings.

The Current Configuration (the 7975 Standalone Termination Unit’s active set

of configuration options)

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

the factory default configuration options)

If the factory default settings do not support your network’s configuration, you

can customize the configuration options for your application. 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.

7975-A2-GZ41-00 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

→

Default Factory Configuration

ÎÎ

main/config/edit Hotwire

Model: 7975

CONFIGURATION EDIT/DISPLAY

Network

SYNC Port

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 interfaces on

the unit.

SYNC Port Synchronous Data Port Options,

Table 2 Synchronous DTE interface

Ports.

System Options System Options, Table 3 General system options of

the unit.

Communication

Port Communication Port, 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.

8 7975-A2-GZ41-00

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 condition

is recognized.

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

Possible Settings: Enable, Disable

Default Setting: Enable

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

selectable. This option is only available when the standalone unit is configured as an

LTU.

DSL Line Rate

Possible Settings: 144, 272, 400, 528, 784, 1040, 1552 (2 Mbps unit only),

2064 (2 Mbps unit only)

Default Setting: 144

Specifies the DSL line rate of the unit. This option is only available when the standalone

unit is configured as an LTU and AutoRate is disabled (unit is in fixed rate).

Peer IP Address

Possible Settings: 000.000.000.001 – 223.255.255.255, Clear

Default Setting: 000.000.000.000

Specifies the peer IP address for the remote management providing the remote

management link on the DSL loop. This option 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.

7975-A2-GZ41-00 March 1999

Table 2. Synchronous Data Port Options (1 of 2)

Port Type

Possible Settings: E530A, V.35, RS449, X.21

Default Setting: E530A

Determines the port type for the data port.

Payload Rate

Possible Settings: 64,128,192,256,320,384,448,512,576,640,704,768,832,896,

960,1024,1088,1152,1216,1280,1344,1408,1472,1536,1600,1664,1728,1792,

1856,1920,1984,2048

Default Setting: 128

NOTE: Payload rates of 1088 kbps and higher pertain only to the 2 Mbps

termination unit.

Specifies the payload rate of the port. This option is not displayed on the unit when

AutoRate is enabled or the unit is configured as an NTU. The LTU configures the

payload rate for the NTU when AutoRate is disabled.

Transmit Clock Source

Possible Settings: Internal, External

Default Setting: Internal

Specifies whether the transmitted data for the synchronous data port is clocked using an

internal clock provided by the LTU (synchronized to the clock source specified by the

clock source configuration option) or an external clock provided by the DTE connected

to the synchronous data port. If an external clock is used, it must be synchronized to the

same clock source as the LTU.

Invert Transmit Clock

Possible Settings: Disable, Enable

Default Setting: Disable

Specifies whether the clock supplied by the 7975 Termination Unit on the TXC

interchange circuit DB (CCITT 114) is phase inverted with respect to the Transmitted

Data interchange circuit BA (CCITT 103). This configuration option is useful when long

cable lengths between the 7975 Termination Unit and the DTE are causing data errors.

Send All Ones on Data Port Not Ready

Possible Settings: Both, Disable, DTR, RTS

Default Setting: Both

Specifies the conditions on the data port that determine when valid data is not being

sent from the DTE. When this condition is detected, all ones are sent to the network.

Action on Network LOS Alarm

Possible Settings: Halt, None

Default Setting: Halt

Specifies the action taken on the synchronous data port when an LOS (Loss Of Signal)

alarm is received on the network interface.

Network Initiated Data Channel Loopback

Possible Settings: Disable, Enable

Default Setting: Disable

Allows the initiation and termination of a Data Channel Loopback (DCLB) by the receipt

of a DCLB-actuate sequence or DCLB-release sequence from the network or far-end

device.

10 7975-A2-GZ41-00

March 1999

Table 2. Synchronous Data Port Options (2 of 2)

Port (DTE) Initiated Loopbacks

Possible Settings: Disable, DTLB, DCLB, Both

Default Setting: Disable

Allows the initiation and termination of a local Data Terminal Loopback (DTLB) or remote

Data Channel Loopback (DCLB) by the DTE connected to this port. (DTLB is equivalent

to a V.54 loop 3, and DCLB is equivalent to a V.54 loop 2.) Control of these loopbacks is

through the DTE interchange circuits as specified by the V.54 standard.

ElasticStore

Possible Settings: Disable, Enable

Default Setting: Enable

Used to enable or disable a first in first out (FIFO) buffer circuit for the incoming external

clock. This circuit is used to compensate for the differences between the frequencies of

the data clocks for the two units in the circuit. This option only applies if the unit is set for

external timing.

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 unit.

Test Timeout

Possible Settings: Enable,Disable

Default Setting: Enable

Allows user-initiated 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.

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