Modules Located In The Ccu; Module Location - BT Versatility Installation And Maintenance Manual

BT Versatility
Installation and Maintenance Manual

Modules located in the CCU

There are a number of modules that can be installed in the CCU:
• Analogue Line Module (Coloured Black). This provides 2 Analogue exchange lines.
Up to two of these modules can be installed in the CCU to provide two or four
Analogue lines.
• Digital Line Module (Coloured Red). This card provides one ISDN 2 Basic Rate
Interface. The same module is used for the network T interface and the internal S-bus.
Up to two of these modules can be installed in the CCU providing one or two Basic
Rate Interfaces.
There are two slots in the CCU for the Network modules. If required one
slot can be equipped with an Analogue module and the other with an
ISDN Module:
• Voice module 2 or 4 port (Coloured Blue). Only one of these modules can be inserted
in a unit.
• Primary Rate ISDN module (Coloured Yellow). This module provides for a Primary
rate ISDN interface. Up to 30 B-channels can be provided. (Availability TBC).
When a Primary Rate Interface is installed, the unit can be further
equipped with one or two Analogue modules or one or two ISDN Basic
Rate modules to provide backup in the event of the Primary Rate
interface failing.

Module location

The Network, Voice and Primary Rate module locations in the CCU are indicated below.
10
Voice Module
Primary Rate ISDN
Network Module 1
Analogue lines 1 and 2 or the
First Basic Rate ISDN Line
Network Module 2
Analogue lines 3 and 4 or
the second Basic Rate
ISDN Line or the Internal
ISDN S Circuit
0