Mt ct 01 – Comelit MT CT 01 User Manual

Page 12

MT CT 01

MT CT 01

XPANSION CARD FOR ANALOG OUTSIDE LINE

. 2908

This card allows a second Telecom telephone line to be connected to the switchboard.
A single expansion 2908 can be inserted for a maximum of two telephone lines. In the case of a power supply
failure, the second telephone line is automatically connected on branch T2.

Installation of the expansion
Before proceeding, the 220V voltage to the switchboard must be removed.
At this point, according to what is indicated in Fig. 3:
1. Remove the side covers and the central cap from the switchboard.
2. Remove the cap of the connector which will house the card.
3. Insert card 2908.
4. To ensure card stability, it is necessary to fix it using the spacer provided.
5. Put back the covers and the cap.
6. Put back the 220V power supply.
7. The card will be recognised automatically.

Default configuration
Once the card is inserted, the configuration of the branches in relation to line 2 is as follows:
• All the branches are enabled to receive calls from line 2
• All the branches are enabled to outgo over line 2

What needs to be programmed in the case of card replacement:
No programming is needed - the configurations / enablements of the second outside line are kept.

SDN

1 S

YSTEM BASIC ACCESS WITH

ELECOM

1 P

LUS INTERFACE

In the case of a telephone system with two ISDN lines (basic access) with only one telephone number and a
single group of branches which reply and call on line 1 and 2 indifferently, it is necessary to configure the
Telecom NT1 PLUS interface appropriately.
Here is an example: imagine that the user the user Rossi has a basic ISDN access with NT1 PLUS interface.
On the two analog lines (1 and 2) of the interface a 2906 switchboard is attached complete with second
expansion line. The telephone number of Mr Rossi is 06-760000.
With the default configuration of NT1 PLUS, by calling number 06-760000 both lines 1 and 2 ring. The first
which is used for the reply frees the second.
For correct use of the telephone switchboard it is necessary to programme the NT1 plus so that by calling
number 06-760000 only one of the two lines rings - the first which is found to be free.
To programme the Telecom interface, extended configuration of incoming calls must be carried out:

par. 6.1.1.1 of NT1 PLUS manual
• disconnect the mains power supply
• open the terminal board compartment and disconnect the line telephone cable
• reconnect the mains power supply
• connect a telephone to the analog output a/b 1 or a/b 2

par. 6.2.1 of NT1 PLUS manual
• digit the multi-frequency keys # * # #*#