LOS
Red
ON
Loss of optical signal.
LOF Red ON
Loss
of
frame
BER
Red
ON
Bit error in 2M lines
CH1-CH4 Green ON
E1 channels indicator. Green means All the
2M tributaries are working normally
LINK1 Green
ON/OFF
Ethernet rate indicator. ON means 100M on
the TP1. OFF means 10M
LINK2 Green ON
Ethernet rate indicator. ON means 100M on
the TP2. OFF means 10M
FDX1 Green
ON/OFF
ON means TP1 under Full Duplex Mode,
OFF means Half Duplex mode
FDX2 Green
ON/OFF
ON means TP2 under Full Duplex Mode,
OFF means Half Duplex mode
BT1 Green
ON/FLASH
ON means no data on the TP1, Flash means
transmit or receive data.
BT2 Green
ON/FLASH
ON means no data on the TP2, Flash means
transmit or receive data.
DIP Switches and Buttons
Item Description
CALL
Push down to make a call with remote side
PWR
ON means power on
，
OFF means power off
DIP switches
Description
SW1
SW1
1 ON means to loop back from remote 1
st
E1 tributary
2 ON means to loop back from remote 2
nd
E1 tributary
3 ON means to loop back from remote 3
rd
E1 tributary
4 ON means to loop back from remote 4
th
E1 tributary
5 NA
6 NA
7 NA
8 NA
9
OFF means loop back from remote side, ON means loop back from
local side
10 ON means bell cut
PHONE
RJ-11, engineer order wire
