Loopback Testing For Serial Interfaces; Troubleshooting Fxs/Fxo - Avaya 2330/4134 Troubleshooting Manual

Troubleshooting a physical media problem
Table 17: Variable definitions
<number>

Loopback testing for serial interfaces

Use the commands in this section to run loopback tests on a serial interface.
Procedure steps
1. To access loopback testing commands, enter:
2. To begin a loopback test of the serial interface in DTE mode, enter:
3. To begin a line test for a serial interface in DCE mode, enter:
4. To begin a cable test for a serial interface in DCE mode, enter:
5. To begin a remote test for a serial interface in DCE mode, enter:

Troubleshooting FXS/FXO

Ensure you use straight cables with FXS and FXO modules. TIP must connect to TIP and RING
must connect to RING. FXS ground start does not work if polarity is reversed.
The following table describes the LED states for the 2- and 4-port FXO and FXS Small
Modules.
60 Troubleshooting
Variable
test {serial|hssi} <slot/port>
dte_loop
dce_loop line
dce_loop cable
dce_loop remote
Comments? infodev@avaya.com
Value
The T1 number or range of T1s (1–28). For
example:
• loopback line_t1 1
1
• loopback remote line_t1 1-3
applies to T1 1 to T1 3
– applies to T1
–
August 2013