BT ISDN Technické informace stáhnout pdf (Strana 12)

ISDN extension wiring

If you are fitting extension wiring terminate the cable

with an RJ45 plug and use either of the two linebox

sockets. Cable to specification ISO/IEC 11801 should

be used to complete the installation. Please refer to

Table 1 for RJ45 plug wiring and Diagram 1 for sample

wiring configuration/switch settings. All extension

wiring must have a Type 2 socket (which incorporates

terminating resistors), as the last socket. Up to eight

terminals may be connected to an ISDN 2e line using

extension wiring. The number of terminals is

determined by the length of extension wiring.

Diagram 1 – ISDN Extensions

Diagram 1a & b.

Up to eight extensions can be added to one ISDN 2e

linebox. In these scenarios the Type 2 (terminating

socket) must be no more than 150m from the linebox.

The L/S switch should be set to S.

Your ISDN 2e box

• Green SERVICE LED (indicates that the digital

service is working when lit)

• ISDN sockets (digital equipment sockets)

• S-Bus configuration switches (used for digital

wiring. Switch 1 is set to IN and Switch 2 is set to

S by default. An engineer uses these when

installing extension wiring).

Do two things at once

You will now be able to use any two pieces of

equipment simultaneously, except when you’re

accessing the Internet at 128k, which counts as

two calls.

Important supporting information:

• When both channels are being used

simultaneously for digital calls, incoming calls

will receive an engaged tone.

• You will not be able to make outgoing phone

calls when using both channels or without first

closing the connection or switching the

connection to use only one channel.

NTE8

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BT ISDN Technické informace Strana 12