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ACCULINK 316x DSU/CSU
4-20 January 1997 3160-A2-GB21-50
Starting a Data Channel Loopback
The Data Channel Loopback command (DCLB) loops
the data received from the network interface, for all DS0
channels allocated to the selected port, back to the
network. The loopback occurs after the data passes
through the port circuitry but before it is sent out the data
port.
496-14315-02
CSUDSU
NETWORK
INTERFACE
DTE
(DSX-1)
DCLBDCLB
PORT 1PORT 2
ALL 1sALL 1s
To perform a Data Channel loopback,
1. From the top-level menu screen, select Test.
2. From the Test screen, select Lpbk.
F1
Test:
Rlpbk Lpbk Ptrns
F2
F3
3. From the Loopback screen, press the key until
the DCLB selection appears on the screen.
4. Select DCLB.
F1
Loopback:
DLB RLB DCLB
F2
F3
5. From the DCLB screen, press the Function key for
the port for which you want to perform the data
channel loopback. Use the scroll keys, if
necessary.
F1
Loopback: DCLB
Prt1 Prt2 Prt3
F2
F3
Test Started appears on Line 2. If a Data Channel
loopback is already in progress, the Already
Active message appears. If an invalid combination
of loopbacks is in progress, the error message
Invld Test Combo appears (see Table 4-8 for
valid loopback test combinations).
Starting a Data Terminal Loopback
The Data Terminal Loopback command (DTLB) loops
the data received from the selected port, for all DS0
channels allocated to the port, back out of the port. This
loopback occurs after the data passes through the port
circuitry but before it reaches the T1 framer.
496-14314-02
CSUDSU
NETWORK
INTERFACE
DTE
(DSX-1)
ALL 1s
DTLBDTLB
PORT 1PORT 2
To perform a Data Terminal loopback,
1. From the top-level menu screen, select Test.
2. From the Test screen, select Lpbk.
F1
Test:
Rlpbk Lpbk Ptrns
F2
F3