User manual

Raisecom Technology Co., Ltd

4. How to use

4.1. Introduction of the Front Panel

The front panel includes the indications of E1 receiving signal loss alarms and optical

alarms. All the alarms are for the receiving link (signal input). The Line L indicates the

alarms generated at the local site and Line R at the remote site. The remote alarms are

sent through the optical link, so that they are accurate only when the optical receiving is

Power (Green), ON when works properly

E1 LOS alarms (Red): ON when loss of signal in E1 channels

LOS optical alarm (Red): ON when loss of signal in optical link

ERR alarm (Yellow): ON when receiving error occurs. The

detailed alarm reasons, including LOF, 10

-3

BER, and 10

-6

can be viewed in network management software.

Fiber connector: DSC/PC for dual-strand fiber, TX for transmit and RX

for receive; SC/PC for single strand fiber

Mask fake alarm button:

Push-in, mask E1 fake alarms; push out, unmask.

Valid for both Unit 1 and Unit 2

Figure 1. Sketch of RC802-120B*2, RC804-120B*2 front panel

L line indicates local alarms, R for remote alarms

Fixing Handle

First Unit

Second Unit. The definitions are the same as the

first unit.