User manual

Raisecom Technology Co., Ltd
16
5.3.2. Electrify
If power supply (PS) is DC –48V, first connect middle end to PGND. Turn off PS, connect
“-48V” end with the lower electric level cable, “0V” end with higher electric level cable.
Make sure no reverse connection, or no short circuited, and then turn on power.
If PS is AC 220V, use the PS line in the accessories.
When PS is turned on, the PWR indicator shall 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.
z Test error bit
Use 2M BER Tester to test every E1 error bit level.
z Mask unused E1 alarm
If E1 links are already connected, but there is still are unused E1 tributaries. In this case the
LOS alarm of unused E1 links is called “unused E1 alarm”. Press MASK/NO MASK button
“on” to clear all the unused E1 alarm and all the LOS alarm indicator of E1 tributaries are
“off”.
In the case unused E1 tributary alarm being masked, if disconnection occurs at linked E1
tributary, the LOS indicator of this tributary still will be on.
If power supply is off and back to one again, then the mask function disabled. To enable
mask function need press button to “off” and then pressed it to “on” again.
z Turn on the alarm ring
If after a period of operation, need new E1 tributaries to be connected, need first disable
the mask function and then connect E1 link.