Configuring Buttons And Switches - Raisecom RC801 User Manual

When PS is turned on, the PWR indicator should be on.

5.3.3. Configuring Buttons and Switches

After turning on power of the device, first ensure there is no alarm on optical port. If optical
ports are connected properly, there shall be no LOS, LOF, and E-3 alarm. The E-6 (yellow)
may be on the moment when the power is just turned on. This is because turning on the
power causes jitters which results in a few bit errors. After 10 seconds, E-6 will be off. This
indicator refreshes in every 10 seconds.
Bit error rate test
Using 2M bit error tester as well as loop-back switch of front panel can test the bit error
level of E1 channel. See Chapter 3.
Mask unused E1 channel alarm
If the connected E1 links are working in good condition without any signal loss, while there
is still another unused E1 link, the LOS alarm for unused E1 link may occur, which is called
"unused E1 alarm". Press MASK/NO MASK button "on" to clear all the unused E1 alarm
and all the E1 LOS alarm indicators will be off.
In the case unused E1 link alarm being masked, if the connected E1 sub-channel is
disconnected, the LOS indicator of this sub-channel will still be on.
If power supply is cut off and turned on again, then the mask function will be disabled.
Press button to "off" and then pressed to "on" again.
If after a period of operation, a new E1channel is needed, first disable the mask function
and then connect E1 link.
Turn on the alarm ring
Press the button "ON" of EN RING / DIS RING to make alarm ring available. In this
time, if there is any one alarm indicator on, it will ring like "ZI...ZI...".
GL alarm indicator lock (optional)
When there is no alarm indicator on, press GL LCK / GL CLR to "ON", global alarm lock
function is configured as enable. If there is any alarm, then the global alarm indicator will
keep on. When all other alarm are eliminated, press the button of GL LCK / GL CLR to
"OFF" to clear the GL alarm indicator
When the GL LCK / GL CLR button is "OFF", also called real time display, i.e. if there is
other alarm, the global alarm is on; if there is no other alarm, the global alarm is off.
In the unstable voltage environment, there are often instantaneous alarms for voltage
waving. In this environment, it is not suitable for operating the GL alarm lock function.
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