Raisecom RCMS2504-120 User Manual - page 15
Raisecom Technology Co., Ltd
14
on electricity.
5.3.2. Electrify
Implement above operations before turning on electricity.
If supply power with DC –48V, please connect ‘GND’ terminal with protection GND, ‘OV’ terminal
with high potential cable, and -48V terminal with low potential cable. Make sure you follow above
statement, and assure firm installation and no open circuit.
If supply power with AC 220V, please use power cord.
Power indicator ‘PWR’ is ON after turning on electricity
5.3.3. Button usages and switch configurations
Assure there are no alarms for optical interface after turning on electricity. If correctly connect
optical interface, alarm of LOS LOF and E-3 will not occur. E-6 might be yellow after first turning
on electricity. Because ultrashort jitter of electricity will cause slight bit errors.
z
Test bit error
Use 2M Tester to test every E1 error bit level tested through tying in loopback control switch
of front panel (please refer to chapter two).
z
Shield unused E1 alarm
If there is no any alarm in connected E1 links, but still have unused E1 branches, LOS alarm
indicator of unused E1 links called as ‘unused E1 alarm’ is ON. Press MASK button in to clear
all the unused E1 alarm and all the LOS alarm indicator of E1 tributaries are OFF.
If disconnection occurs in linked E1 branch, the LOS indicator of this branch will be still on
after shielding unused E1 alarm.
If recover power supply after turning off it, the shield function is disabled. Should press button
out and then press it in again.
z
Set off or mute alarm
Press RING/MUTE button in to set off alarm. Meanwhile, if any alarm indicator is ON, alarm
will make a harsh sound.