www.raisecom.com
User Manual
46
Chapter 7
FAQ
7.1
SYS is ON
When there are alarms SYS will be ON. You can check the alarm information through network
management or Hyper Terminal to confirm why the buzzer buzzes:
a.
Fail to communicate with user card.
b.
Fail to communicate with line-board when line-board is RC3000-OPT.
c.
Collision of channel occupation.
d.
Fan problems.
e.
Temperature collection problems.
If these are not the reasons why buzzer buzzes, please contact us for technical support.
7.2
Alarms of E1 interface
If there are LOF, LOS or AIS alarms, please check the followings:
a.
Cable of E1 or optical interface has been correctly connected.
b.
Device connected to RC3000 works normally.
c.
If E1 is not used, please shut it down.
d.
Verify the impedance of both ends match each other, or change the impedance.
e.
Verify grounding protection.
If these are not the reasons, please contact us for technical support.
7.3
Cross connection cannot communicate normally
If channels cannot communicate normally, judge from the followings:
a.
RC3000s of both ends work normally, otherwise reset the devices.
b.
Correct use of user cards in both ends.
c.
Verify the cables connected to user cards are good.
d.
Verify the synchronization of devices at both ends.
e.
Correct cross connection.
f.
Verify correct parameter configuration, such as signal mode, data phase and etc.
If these are not the reasons, please contact us for technical support.
7.4
There is no alarm but voice channel is discontinuous or communication is
abnormal
Generally asynchronous of multi-frame causes this phenomenon, check whether there is loss of
multi-frame of RC3000 E1 interface or CRC loss of multi-frame. If there is loss of multi-frame, the
followings can resolve this problem:
a.
Enable or Mask CRC4 to synchronize the two ends.
b.
Make sure of synchronous clock, and we recommend one clock in one network.
c.
User cards work normally.
