Advertisement
3.1 Installation
3.1.1 connecting
E1 interface
There are two groups DB37 male connectors above every MPU slot of RC004-16. The first
DB37 group from the top is for 1~4 E1 of 1
75ohm unbalanced: CC4B-8G adapter is installed on DB37 male connector.
CC3-K3 coax cable on adapter. It is suggested to connect with SYV 75-2-2 for 75ohm
unbalanced.
120ohm balanced: it can be installed DB37 female adapter with twisted pair cable for E1
output/input on DB37 male connector on our PDH.
Optical interface
Plug the SC fiber tail into optical interface (push hard until to the deep end). If not sure about
transmission direction, it's advised first to turn on the power of device and then plug in the fiber
cable.
3.1.3 Power supply connection
Open PWR of RC004-16.
When it is electrified, it is necessary to confirm no alarm on optical interface at first. There is
no LOS alarm if optical interface is right. ERR is yellow when device is just electrified. The reason
is that the moment of current coming can bring a little error bit. After 10~20 seconds, ERR is off.
ERR includes LOS, LOF, 10
3.1.4 Mask unused E1 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.
Chapter 3 Installation and test
-3
-6
and 10
.
st
unit; the second DB37 is for 1~4 E1 of 2
nd
unit.
- 5 -
Advertisement
