User manual

Raisecom Technology Co., Ltd
19
V.35 and E1 interface both remote bidirectional loopback sketch map:
Above figure is the result of the configuring remote bidirectional loopbacks of both V.35
interface and E1 interface on “local fiber optic modem”. At the same time the remote fiber
optic modem’s loopback dip-switch should be all OFF in default.
V.35 and E1 interface both local bidirectional loopback sketch map:
Above figure is the result of the configuring local bidirectional loopbacks of both V.35
interface and E1 interface on “local fiber optic modem”. At the same time the remote fiber
optic modem’s loopback dip-switch should be all OFF in default.
4.3.3. Function Dip-switch (SW6)
1
st
bit 2
nd
bit 3
rd
bit 4
th
bit 5
th
bit 6
th
bit 7
th
bit 8
th
bit
Set
Fault
Pass
Reserved Reserved Reserved
Configuration of vendor
ON Enable
OFF Disable Normal Normal Normal
Forbidden to be changed by users
1. The 1
st
bit: Fault Pass dip-switch (Default is OFF)
SW6-1 Fault Pass Function
ON Enable
OFF Disable
When the fault pass function is enabled, the alarms on fiber receiving side and
transmitting side will be transferred to DCD and CTS signals on 1
st
tributary V.35 interface;
when the fault pass function is disabled, the DSR, DCD and CTS signals on V.35 interface
will be always valid.
When the fault pass function is enabled, and if there is local alarm on fiber optic modem,
that is to say there are errors on fiber receiving side, the DCD signal of V.35 interface will
Local fiber
optic modem
Remote fiber
optic modem
E1 Error code
equipment
Fiber
V.35
E1
V.35
E1
V.35 Error code
equipment
V.35 Error code
equipment
E1 Error code
equipment
Local fiber
optic modem
Remote fiber
optic modem
E1 Error code
equipment
Fiber
V.35
E1
V.35
E1
V.35 Error code
equipment
V.35 Error code
equipment
E1 Error code
equipment