Zhone 891630, Справочное руководство системы

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6-28 IMACS System Release 5.1.9 Reference Guide
Model No.
Running Head
Interface Card Troubleshooting Interface Card
6.5.2 Alarm Reporting Problems
The Interface card also provides a relay contact closure to an external alarm annunciation (or
other alarm reporting device at the system site) when an alarm is declared. The card may be
faulty if an alarm is declared but not indicated on the external alarm reporting system. Check
the wiring from the Interface card NODE port to the alarm system. If the wiring is good,
replace the Interface card.
Note: Removal of the Interface card will cause a service disruption on all T1 and E1 WAN
links of the system.
6.5.3 WAN Transmission Problems
A faulty Interface card could cause T1 and E1 WAN service disruptions, since this card also
provides the WAN connections. Electrically, the Interface card resides between the WAN
cards and the T1/E1 network. If all T1 and E1 links are down (as evidenced by system alarms
in progress), first check the cable from the WAN jack of the Interface card to the network. If
the cable connection is good, replace the Interface card.
Note: Removal of the Interface card will cause a service disruption on all T1 and E1 WAN
links of the system.
If the problem is with only one T1 or E1 WAN link, refer to the WAN Chapter in this manual
and troubleshoot that link and its associated WAN card. Use the loopbacks provided in the
WAN card user interface screens in conjunction with the built-in test patterns you can apply
from the Integrated Access System. These test functions allow you to isolate the problem to
the local or far (remote) end. You can then check the interconnect cabling from the Interface
card to that link, and sequentially replace the WAN and/or Interface card, one by one, until the
trouble clears.