Interface Is Accruing Errored Seconds And Clock Slips; Yellow Alarm - HP ProCurve 7000dl Series Basic Management And Configuration Manual

Configuring the E1 + G.703 and T1 + DSX-1 Modules
Configuring the T1 + DSX-1 Module
9-22
If the unit stays in alarm, change the cable. If the router now goes out of alarm,
again, you know that the cable, and not the interface, is the problem.
Troubleshoot connections between the T1 interface and the wall jack in the
same way.

Yellow Alarm

A yellow alarm indicates that although the DSX-1 is receiving signals, the PBX
is in red alarm. The PBX may not be capable of handling the signal that the
interface is sending to it. Try lowering the signal output, either by setting a
shorter line length or by configuring the signal at -7.5 decibels.

Interface Is Accruing Errored Seconds and Clock Slips

If, on the other hand, the PBX or CSU is not at fault, you might have a problem
with synchronization. You can detect this problem by using the show inter-
faces command to view the DSX-1 interface status. When you view the output,
you should not see steadily increasing errors. Clock slips indicate that the ends
of the line are unable to properly synchronize their signals.
Check the clock source setting for both interfaces on the T1 + DSX-1 module.
If the DSX-1 interface is taking the clock from the PBX, change the clock
source to the through option for the T1 interface that controls port 1 on the
T1 + DSX-1 module.