Installing A Channel Service Unit (Csu); Troubleshooting T1/E1-Common Symptoms - Altigen AltiWare ACC 5.2 Administration Manual

If AltiServ 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 signals, repeat signals, and respond to
loopback commands sent from the central office. A CSU is mandatory for connecting to
AltiGen's T1/E1 board.
1. Connect the CSU (Adtran model T1 CSU ACE used as an example) to the T1/PRI or
T1/E1PRI board using an RJ-48C or RJ-48X cable.
2. Connect the CSU to the network termination box using an RJ-48C or RJ-48X cable.
AltiGen T1 Socket (RJ-48)
Pin 1=Receive Ring (INPUT)
Pin 2=Receive Tip (INPUT)
Pin 4=Transmit Ring (OUTPUT)
Pin 5=Transmit Tip (OUTPUT)
CSUs also are used for line lengths over 75 feet, which helps to resolve
Note:
attenuation issues.
Troubleshooting T1/E1—Common Symptoms
The most common problems when installing T1 CAS or T1 PRI services:
1. The service provider misconfigures your T1 CAS/T1 PRI service or terminates your
service improperly.
2. T1 is installed but not turned on because there is no termination device for a period
of time.
3. T1 is turned on but channel is not in service.
AltiWare provides basic troubleshooting information in the T1 Span Configuration
window, described in "T1 and E1 Configuration" on page 117.
Chapter 11: Board Configuration
Refer to your CSU manufacturer's
manual for the proper pinout.
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