User manual

Raisecom Technology Co., Ltd
18
z LOS red indicator of E1 channel is on
Answer: Loss alarm of RX signal at E1 channel, there is no HDB3 signal received. Check if
it connects well at E1 port; if the connection of 75 Ω cable reverse and if the string of 75 Ω
cable in right order. If there is LOS alarm of unused E1 tributary, can press “mask” button to
“on” to make alarm after configuration of device.