Mitel 3000
Administrator’s Manual
T1 (RBS) T1/E1 PRI INTERFACE
The system can be equipped with a T1/E1 card to provide up to 24 T1 Robbed Bit Signaling (RBS)
channels, 23 T1 Primary Rate ISDN (PRI) channels or 30 E1 PRI Channels. The programming and set up
options available on the T1/E1 PRI interface are described below.
By default the system is programmed as T1 (RBS).
(PRI)TRUNK TYPE
If your trunk type is not T1 (RBS) you will need to select a PRI Type from E1 or T1.
To select the Trunk type:
Note: If the trunk type is a T1 (RBS) you do not need to choose any of these options.
From the programming extension, press the PROGRAM key.
Press the Scroll Down key () until “System Programming” is displayed.
Select “System Programming”.
Enter the System Programming Password and select “System”.
Press the Scroll Down key () until “Trunk Type” is displayed.
Select the required option “T1 PRI” or “E1 PRI”.
Select “Exit”
T1 (RBS) OR PRI (ISDN)
When a T1 card is installed it is automatically set as a T1 interface with 24 E&M wink start channels. It can
be changed to PRI ISDN.
From the programming extension, press the PROGRAM key.
Press the Scroll Down key () until “System Programming” is displayed.
Select “System Programming”.
Enter the System Programming Password and select “Lines”.
Press the Scroll Down key () until “T1 (RBS) or PRI (ISDN)” is displayed.
Select the required option.
The default is that T1 (RBS) is set. A solid diamond indicates the option selected.

T1 (RBS) Channel programming

If T1 (RBS) is selected the default settings are as follows: -
Framing is set as D4 Superframe.
Coding is set as AMI.
Line Build-Out is set at -7.5dB.
The Line Type is E&M with no Service Types and Wink Start.
The received digits is set at 2.
The Line gain is set at -3dB.
Dialing is set at DTMF.
Each of these settings can be changed as required.
Programming the type of Framing on the T1
There are two different types of Framing provided by the carrier that are programmable on the T1 interface.
They are D4 Superframe or Extended Superframe.
From the programming extension, press the PROGRAM key.
Press the Scroll Down key () until “System Programming” is displayed.
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