Table 17: Variable definitions
Variable Value
<number> The T1 number or range of T1s (1–28). For
example:
• loopback
line_t1 1 – applies to T1
1
• loopback remote line_t1 1-3 –
applies to T1 1 to T1 3
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:
test {serial|hssi} <slot/port>
2. To begin a loopback test of the serial interface in DTE mode, enter:
dte_loop
3. To begin a line test for a serial interface in DCE mode, enter:
dce_loop line
4. To begin a cable test for a serial interface in DCE mode, enter:
dce_loop cable
5. To begin a remote test for a serial interface in DCE mode, enter:
dce_loop remote
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.
Troubleshooting a physical media problem
60 Troubleshooting August 2013
Comments? infodev@avaya.com
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