User manual

www.raisecom.com User Manual
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31
E1-LOOP
Dip-switch
4 bits Bit1-4 the 1
st
to 4
th
E1 tributary loop-back configuration.
Bit1 = OFF , the 1
st
E1 tributary is not loop-back;
Bit1 = ON, the 1
st
E1 tributary is loop-back.
The configuration method of Bit2 to Bit 4 is same as Bit 1.
3. Interface on front panel
There are E1 and PC-AGENT ports on front panel.
Table 3-20 RCMS 2811-120FE Front Panel Description 6-Interface
NO. Name Bits Description
32
1-4
RJ45 and
BNC
1
st
-4
th
E1 tributary interface (750Ω is BNC interface and 120Ω is RJ45
interface).
LNK-UP
RJ45 Local network management interface. LNK-UP connects to PC serial
port or connects to upper device’s LNK-DWN interface when
concatenating. It complies with RS232 electrical standard and the baud
rate is 19200bps.
33
LNK-DWN
RJ45
LNK-DWN
connects to upper device’s LNK-UP interface when
concatenating. It complies with RS232 electrical standard and the
baud rate is 19200bps.
E1 Loop-back Test
The E1 loop-back position can be configured by SEL Bit4 dip-switch. Remote loop-back and local
loop-back are shown in following figure 3-11 and 3-12.
Local
Fiber
E1
E1
Bit Error
Tester
Remote
Multi-
core
Multi-
core
Figure 3-11 sketch map of setting remote loop-back on local site
Local Remote
Fiber
E1 E1
Bit Error
Tester
Multi-
core
Multi-
core
Figure 3-12 sketch map of setting local loop-back on local site
NOTE: 1. Please make sure that there is no alarm on optical port before configuring the remote E1 loop-back.
2. When configuring any loop-back on local multiplexer, all E1 loop-back dip-switches on remote
multiplexer must be OFF in default.