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LOS red indicator of E1 sub-channel is on
Answer: Loss alarm of RX signal at E1 sub-channel, no HDB3 signal is received. Check
whether all E1 ports are connected well, or whether 75Ω cables are reversely connected, or
whether the wires of 120Ω cables are in correct sequence. If LOS alarm occurs at unused
E1 sub-channel, press "mask" button to "on" to musk the alarm after finishing the
configuration of device.
Mask button is on, but there is still alarm in unused E1 sub-channel.
Answer: probably the mask function is disabled if power supply is cut off and then turned on.
To solve is by pressing the mask button to "OFF", and then pressing to "on" to enable mask
function.
•
How to unplug the coaxial cable from the coaxial connector.
Answer: push the thickest part of the connector without turning, and then pull out the
coaxial cable.
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Raisecom Technology Co., Ltd
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