Zte ZXG10 BS21, Руководство по обслуживанию

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Chapter 3 - Routine Maintenance
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i. If ACT red indicator flashes, it means the channels are blocked
(SDCCH, TCH and etc.). First through dynamic data management,
unblock the carrier frequency where BCCH is located; if it doesn’t
work, reset this ETRM module; if the fault still exists, replace this
ETRM module then.
ii. When the ACT red indicator is on, it shows that the ETRM module
may be faulty. To solve this problem, replace the ETRM module. If
it does not work, replace the ETRM module.
5. STA troubleshooting
i.
If the STA red indicator flashes at the frequency of 1 Hz, it shows
that the LAPD links on FUC and BSC are broken. For information of
troubleshooting of LAPD link broken alarms, refer to “Disconnected
LAPD Link between FUC and BSC”.
ii. If the STA red indicator flashes at a frequency of 4 Hz, it shows
that HDLC links in the ETRM module are broken. To troubleshoot it,
check at the background or LMT whether there is a CMM and FUC
communication breakdown alarm. For troubleshooting of the alarm,
refer to “Interrupted Communication between CMM and FUC”.
iii. If the STA red indicator is on, check at the background or LMT
whether there are alarms related to the temperature, clocks and
frame number. For troubleshooting information, refer to “ETRM
Alarm”.
[ Recovery after test ]
None.
Checking Running Status of ECDU
Module
[ Instruments and meters ]
None.
[ Test procedure ]
Check status of indicators on CDU module panel.
[ Normal result ]
Table 13 lists normal status of indicators on CDU module panel.