AltiGen MAXCS 7.0 Update 1 ACM Administration - Manual (Page 140)

Chapter 11: Board Configuration
124 MaxCS 7.5 Administration Manual
Figure 72. PRI Calling Number Setting
Most PRI trunks allow a MAXCS system to send calling numbers. For example, 10 different extensions in the
same PBX system have 10 different DID numbers. With the calling number feature provided by Carriers, the
callee will receive a more accurate caller ID.
PRI Calling Number can also be used in a mobile extension or IP hop-off to PRI trunk, so the callee can receive
a more accurate caller ID.
When a PRI span is subscribed, a block of DID numbers will be provided by the Carrier. The Carrier should be
able to accept Calling Numbers in the DID number block. However, if the numbers are not in the blocks or the
digit lengths are mismatched, the Carrier might "reject" the call.
The PRI Calling Number Setting addresses this issue. Choose from three options:
• Carrier can accept anything as Calling Number (default)
• Carrier can only accept Calling Number with a minimum of n digits
• Carrier can accept only assigned numbers as the Calling Number.
If you select the third option, specify “assigned numbers” by clicking the Add button and entering the numbers.
To edit or delete a number you added, select it and click the Edit or Delete button.
If MAXCS detects the Calling Number is not accepted by the Carrier, it will always send the number you enter
in the text box at the lower right side of the dialog box as the Calling Number. Enter an appropriate Calling
Number in this box.
Installing a Channel Service Unit (CSU)
This section discusses installing a CSU to the Triton T1 or T1/E1 Board. The channel service unit is a device
used to connect a digital trunk line coming in from the phone company to the PBX. A CSU can terminate sig-
nals, repeat signals, and respond to loopback commands sent from the central office. A CSU is mandatory for
connecting to AltiGen’s T1/E1 board.