Paradyne COMSPHERE 3910 Manual del propietario

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COMSPHERE 3900 Series Modems

Models 3910 and 3911

Government Requirements for Great Britain

Document Number 3910-A2-GK42-00

January 1994

Overview

This document highlights government requirements, safety warnings, installation procedures, features, and

functions that are unique to COMSPHERE

3900 Series modems installed within the United Kingdom. This

document is intended to be used in conjunction with the COMSPHERE 3900 Series Modems, Models 3910 and

3911 Point-to-Point/Multipoint, Installation and Operation Manual, Document No. 3910-A2-GN32. Please

consult this Installation and Operation Manual for overall operation of the 3900 Series modem.

Government Requirements for Great Britain

APPROVED for connection to Telecommunication systems

specified in the instructions for use subject to the conditions

set out in them.

Facilities

This apparatus has been approved for use of the following facilities:

•Modem

•Loudspeaking

•Automatic call initiation

•Detection of Initial Proceed Indication

•Auto Answering

•Operation in the absence of proceed indication

•Auto Clear from the call originating end

•Storage of telephone numbers for retrieval by a predetermined code

•Multifrequency and Loop Disconnect signalling

Any other usage will invalidate the approval of the apparatus if as a result it then ceases to comply with the

standards against which approval was granted.

When entering network addresses into the dialling directory, please ensure that the telephone numbers are

correct.

Connection to Supply Mains

Important

The wires in the mains lead supplied with this equipment are coloured in accordance with the following code:

Green and Yellow Earth

Blue Neutral

Brown Live

As the colours of the cores in the mains lead of this equipment may not correspond with the coloured markings

identifying the terminals in your plug, proceed as follows:

•The core which is coloured green and yellow must be connected to the terminal in the plug which is

marked with the letter E or by the earth symbol , or coloured green and yellow.

•The core which is coloured blue must be connected to the terminal which is marked with the letter N or

coloured black.

•The core which is coloured brown must be connected to the terminal which is marked with the letter L or

coloured red.

SAFETY WARNING

This equipment must be earthed.

For pluggable equipment, the mains socket outlet shall be installed near the equipment and be easily accessible.

Interconnection circuits between this modem and any other equipment should be such that the equipment

continues to comply with the requirements of clause 4.2 of EN41003 for TNV (Telephone Network Voltage)

circuits and clause 2.3 of EN60950 for SELV (Safety Extra Low Voltage) circuits after making connection

between circuits.

The power supply must be properly connected and switched on before the modem will work correctly.

Ringer Equivalence Number

The Ringer Equivalence Number (REN) is a customer guide indicating approximately the maximum number of

items of apparatus that should be connected simultaneously to the telephone line. The sum of the RENs should

not exceed 4. This value includes any BT provided instrument which may be assumed to have an REN of 1

unless marked otherwise. The REN of the 3900 Series modems is 3.

Warning. Do not connect any other items of apparatus in parallel with this modem.

Telephone Line

These modems may be connected to the following circuits:

•Direct exchange lines of the public switched telephone network, but not shared service or 1 plus 1 carrier

systems. The line should provide either loop disconnect or multifrequency signalling.

•Private speechband circuits provided by British Telecommunications, Hull City Council or Mercury

Communications Limited.

•They may also be connected as an extension to a compatible PABX, although there is no guarantee of

correct working in all circumstances.

This modem is suitable for connection to BT circuits with signalling at a nominal frequency of 2280 Hz and

may be connected to multipoint or point-to-point circuits. The apparatus does not require signalling or

otherwise use the frequency range 0–200 Hz.

No d.c. interaction is intended between the modem and the B.T. network.

This apparatus may be directly connected to a speechband circuit or connected to relevant branch system for

speechband circuits.

Receive-to-Transmit Loss (RTL)

The RTL measurement provides an indication of the signal attenuation between the receive pair and transmit

pair of a four-wire circuit. The RTL number for the 3900 Series modems is 75.

The sum of the RTL numbers of terminal apparatus at opposite ends of a particular point-to-point circuit shall

be equal to or greater than 28; and in the case of apparatus permitted connection before 5 August 1984 it shall

be assumed for the purpose of this calculation to have an RTL number of 14 unless it has been tested and

specially allocated a number other than this.

Apparatus having an RTL number greater than 47 must be used to terminate the distant end of this circuit.

Failure to do so is a breach of the conditions of approval of this apparatus.

Connection Arrangements

If any other apparatus, including cable or wiring, is connected between the apparatus and the point of

connection to any speechband circuit, then all that other apparatus shall comply with the following:

1. The overall transmission characteristics of all that other apparatus shall be such as to introduce no

material effect upon the electrical conditions presented to one another by the apparatus and the

speechband circuit; and

2. All that other apparatus shall comprise only:

(i) apparatus approved for the purpose of connection between the apparatus and a speechband circuit;

and

(ii) cable or wiring complying with a code of practice for the installation of equipment covered by this

part of BS6328 or such other requirements as may be applicable.

Technical Specifications

Table 1 shows technical specifications that are unique to 3900 Series modems installed in the United Kingdom.

Table 1

Technical Specifications for the United Kingdom

Specifications Description

TRANSMIT LEVEL

Leased Line –14 dBm (factory default setting)

Dial Line –9 dBm (factory default setting)

These settings can only be changed by qualified AT&T Paradyne

service personnel.

TELEPHONE INTERFACE

Leased-Line Connectivity 8-position modular jack (Model 3910 requires VF cord with

BT631A type modular plug)

50-pin mass termination (Model 3911)

Dial-Line Connectivity 8-position modular jack (Model 3910 requires VF cord with

BT431A type modular plug)

50-pin mass termination (Model 3911)

Equipment List

Table 2 shows a list of modems and telephone cords available for use in the United Kingdom.

Table 2

Equipment List for the United Kingdom

Equipment Model/Part Number

Model 3910 4-wire/2-wire standalone

Model 3911 4-wire/2-wire carrier card

8-position, 8-wire to BT631A modular cord (leased line)

8-position, 2-wire to BT431A modular cord (dial line)

6-position, 4-wire modular cord, 7-foot length

8-position, 8-wire modular cord, 14-foot length

8-position to 6-position crossover modular cord

3910-A1-402

3911-B1-002

035-0170-0031

035-0169-0031

125-0067-0031

125-0053-1431

125-0054-1531

Model 3910 Input Voltage Requirements

The power supply used with the Model 3910 modem (Figure 1) is auto-sensing and capable of operating

(without restrapping) with input voltages from 100 Vac to 240 Vac, and input frequencies from 50 Hz to 60 Hz.

Model 3910 Modem Installation

The following procedures describe how to connect the standalone modem to the leased line, dial line, and

power supply.

Before installing your modem, make sure your installation site is clean and well-ventilated. Allow space around

the modem for installing cables and telephone cords, and make sure the modem is located within reach of the

ac power outlet. The distance between your modem and DTE should be minimized if DTE data rates exceed

19,200 bps. Also, low capacitance cables may be necessary for speeds greater than 19,200 bps or distances

greater than 50 feet.

Figure 1 shows how Model 3910 modems are connected to certain TELCO jack types using the supplied

cables.

Figure 1. Model 3910 Rear Panel and Power Supply

Model 3910 4-wire/2-wire Leased-line Connection

Use the following procedure to connect a Model 3910 to the leased-line network interface (use the VF cord

labeled LEASED LINE):

1. Insert the 8-position, 8-conductor modular plug into the jack labeled LEASED, Figure 1.

2. Insert the BT631A type modular plug into the leased-line network interface.

Model 3910 Dial-Line Connection

Use the following procedure to connect the modem to the dial network interface (use the VF cord labeled DIAL

LINE):

1. Insert the 8-position, 2-conductor modular plug into the jack labeled DIAL, Figure 1.

2. Insert the BT431A type modular plug into the dial network interface.

Power Supply Connection

The power supply is equipped with an 8-pin DIN connector for modem connection, and an IEC 320 power

inlet.

NOTE

A line cord with an IEC 320 connector and the appropriate wall plug

must be provided.

Use the following procedure to connect the standalone modem to an ac power outlet:

1. Make sure the modem’s power switch is in the OFF position.

2. Insert the power supply’s 8-pin DIN male connector into the modem’s rear panel power receptacle

(Figure 1).

3. Insert the outlet connector of the line cord into the IEC 320 power inlet of the power transformer.

4. Insert the line cord wall plug into the appropriate grounded ac outlet in accordance with requirements as

stated in EN60950: ‘‘For pluggable equipment, the socket outlet shall be installed near the equipment

and shall be easily accessible.”

5. Refer to the Modem Power-Up section in Chapter 2 of Document No. 3910-A2-GN32 for modem

start-up procedures.

Model 3911 Modem Installation

To install the Model 3911 modem (carrier card) into the COMSPHERE 3000 Series Carrier, follow the same

installation procedures described in the Model 3911 Modem Installation section in Chapter 2 of Document

No. 3910-A2-GN32. For correct power, DTE, dial, and leased-line cabling procedures, refer to the

COMSPHERE 3000 Series Carrier, Installation Manual, Document No. 3000-A2-GA31.

Note that the Model 3911 supports the following features:

•Carrier assembly

— 3000-B1-301 — COMSPHERE 3000 Series Carrier with 230 volt power transformer unit

— 3000-B1-701 — COMSPHERE 3000 Series Carrier with 200 volt power transformer unit

(Hong Kong)

•Network Interface Modules (NIMs)

— 3000-F1-003 — RJ21X NIM without the Make Busy and Service Line feature

Configuration Options

This section lists functions and configuration options that are unique to the operation of 3900 Series modems

installed in the United Kingdom. The information described in this section differs from what is listed in

Document No. 3910-A2-GN32.

Please note that if a function or configuration option is not listed in this supplement, then it is assumed that

your modem’s functionality and operation follow what is described in Document No. 3910-A2-GN32.

Control Branch — Make Busy/Remove Make Busy Function

The Make Busy function, described in Chapter 3 of Document No. 3910-A2-GN32, is not offered in the

Model 3910 or 3911 modems (3910-A2-402 and 3911-B1-002) for the United Kingdom. If this function is

selected from the diagnostic control panel (DCP), the message Invalid Command appears.

Control Branch — Service Line/Disconnect Service Line Function

The Service Line function, described in Chapter 3 of Document No. 3910-A2-GN32, is not offered in the

Model 3911 modem (3911-B1-002) for the United Kingdom. If this function is selected from the DCP, the

message Invalid Command appears.

Configuration Tables

Tables 3, 4 and 5 describe configuration options that are different for 3900 Series modems installed in the

United Kingdom.

Table 3

Line Dialer Configuration Options for the United Kingdom

Blind Dial Paus: 2sec

Nxt 2sec

Blind Dial Pause. Set to 2 seconds. Read-only and cannot be changed. Only appears when Dial Tone

Detect is disabled.

The AT command is S6=2 and cannot be changed.

Auto Make Busy: Disable

Nxt Disable

Auto Make Busy. Set to Disable. Read-only and cannot be changed. Only appears when using Model 3911

modems.

The AT command is S40=0 and cannot be changed.

MakeBusyVia DTR: Disable

Nxt Disable

Make Busy Via DTR. Set to Disable. Read-only and cannot be changed.

The AT command is S69=0 and cannot be changed.

Table 4

Dial Line Configuration Options for the United Kingdom

Dial Line Rate: 14400(V32b)

Nxt 14400(V32b) 12000(V32b) 9600(V32b) 7200(V32b) 4800(V32b) 2400(V22bis) 1200(V22)

0–300(V21)

Dial Line Rate. Does not support the Bell modulation schemes of 1200 (212A) and 0–300 (103J).

The factory default is 14400(V32b)

AT command for Dial Line Rate is S-Register S41=

, where

is:

1 = 14,400 (V.32 bis) 5 = 4800 (V.32 bis/V.32)

2 = 12,000 (V.32 bis) 6 = 2400 (V.22 bis)

3 = 9600 (V.32 bis/V.32) 7 = 1200 (V.22)

4 = 7200 (V.32 bis) 10 = 0–300 (V.21)

Dial TX Level: –9 dBm

Nxt –9 dBm

Dial Transmit Level. Set to –9 dBm. Read-only and cannot be changed.

The AT commands are &I9 and &J11 and cannot be changed.

V22b Guard Tone: 1800 Hz

Nxt 1800 Hz

V.22 bis Guard Tone. Set to 1800 Hz. Read-only and cannot be changed.

The AT command is &G2 and cannot be changed.

Table 5

Leased Line Configuration Options for the United Kingdom

Leased TX Level: –13 dBm

Nxt –13 dBm

Leased Transmit Level. Set to –13 dBm. Read-only and cannot be changed.

The AT command is S45=13 and cannot be changed.

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