User manual

Raisecom Technology Co., Ltd
6
4. How to use
4.1. Introduction of the Front Panel
Figure1: Sketch of the front panel of RC800-120B
4.1.1. Power indicator
PWR (green): On, power supply is functioning normally.
4.1.2. Alarm indicators
Alarm indicators of both local and remote side can be displayed. The L row indicates “local”.
The R row indicates “Remote”.
• General alarm:
GL general alarm indicator (red): Any generated alarm will make GL indicator “on”.
• LOS for E1 link
LOS1~4 E1 link (red): when there is signal loss of any E1 channel, the relative alarm
indicator turns red.
z Alarm of optical port:
LOS loss of signal (red): When receiving signals are lost, the alarm indicator turns on.
LOF loss of frame (red): When optical receiving frames lose synchronization, the alarm
indicator turns on.
E-3 bit error alarm (red): ON, when the receiving bit error rate exceeds 10
-3
.
E-6 bit error alarm (yellow): ON, when the receiving bit error rate exceeds 10
-6
.
4.1.3. DIP-switch SW1 Setup: All OFF by Default
DIP-Switch SW1 on the front panel is used for setting loop-back detection and saving
the configurations
• 1
st
~ 4
th
: Loop-back
1
st
bit 2
nd
bit 3
rd
bit 4
th
bit Loop-back
1 2 3 4 5 6
OFF
ON
LOS on E1
Function ButtonDip-switch
NM Interface
GL
Power
Alarm of Fiber