User manual

Raisecom Technology Co., Ltd
12
Steady Off: There is no receiving data in V.35 interface.
Notice: This device provides CRC4 checkout’s auto-negotiation function. If there is CRC4
checkout signal in E1 data of optical interface the CRC4 checkout function will be enabled
automatically, and the CRC alarm indicator will be available when there is CRC4 error. On
the contrary, if there is no CRC4 checkout signal in E1 data of optical interface the CRC4
checkout function will be disable and CRC alarm indicator unavailable.
4.1.4. E1 Interface and It’s Indicator
BNC Coaxial Interface: TX, 75Ω unbalanced signal transmission (output);
RX, 75Ω unbalanced signal receiving (input).
RJ-45 Interface: 1
st
, 2nd pin, 120Ω balanced signal transmission (output);
4
th
, 5
th
pin, 120Ω balanced signal receiving (input).
Notice: The 75Ω BNC Coaxial Interface is available in default. If the RJ-45 20Ω balanced
Interface is needed please configure the SW7 on the bottom of the device.
LOS Red:
Steady light: Local E1 receiving signal is lost;
Periodically flash: Remote E1 receiving signal is lost;
Steady off: Local/remote E1 receiving signal is normal.
LOOP Yellow:
Steady Light: Local bidirectional loopback indication;
Flash: Remote bidirectional loopback indication;
Steady Off: There is no loopback in local/remote side.
4.2. Description of the Back Panel
V35
Back Panel of the AC Device