Lucent Technologies DACS II - Remote Loopback Process

Issue 2.0 April 2000
1-5
365-353-255
DACS II Operation and Maintenance Manual
Release 8.2.6 Features
Remote Loopback Feature (Continued)
Remote Loopback
Process
The following process, illustrated in Figure 1-1, is used to set up the Remote
Loopback test:
1. The local multiplexer activates the Remote Loopback signal.
2. The remote multiplexer detects the loopback signal.
3. The remote multiplexer activates the loopback.
4. A test signal is sent through the local multiplexer and over the specified
DS1/E1 tributary. This signal will be sent back towards the local multiplexer.
5. The looped back test signal is received by the local multiplexer and a
comparison is made between the sent and received signals to determine
the condition of each multiplexer and facility between them.
Figure 1-1. Remote Loopback Process
MUX
DEMUX
MUX
DEMUX
Downstream
U
p
stream
DS3 Facilit
y
E-1 or DS1
DSX
1 Activate Loo
p
back Si
g
nal
2 Detect Loo
p
back Si
g
nal
3 Activate Loo
p
back
4 Send Test Si
g
nal
MUX = Multi
p
lexer
DEMUX = Demulti
p
lexer
KCR8 HMXR
Remote Multi
p
lexer
DSX = DS1 or E-1 tributar
y
of H
y
brid DS3 si
g
nal
5 Receive Test Si
g
nal
//
IFTU
NPC
Local Multi
p
lexer (DACS II)
.
.
E-1
or
DS1
.
DSX
//
.
AIS