Paradyne ACCULINK 336x E1 - Manual (Page 78)

ACCULINK 336x E1 NTU
4-20 December 1996 3360-A2-GB20-20
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 E1 framer. All ones are
transmitted to that port.
NTU
DATA
PORTS
(1 - 4)
DTLB HDSL
AIS
DATA TERMINAL LOOPBACK (DTLB)
496-14774-01
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
3. From the Loopback screen, press the key until
the DTLB selection appears on the screen.
4. Select DTLB.
F1
Loopback:
RLB
DCLB DTLB
F2 F3
5. From the DTLB screen, press the Function key for
the port for which you want to perform the data
terminal loopback. Use the scroll keys, if
necessary.
F1
Loopback: DTLB
Prt1
Prt2 Prt3
F2 F3
Test Started appears on Line 2. If a Data
Terminal 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 4-9 for valid loopback test combinations).
Aborting Loopbacks
The Abort Loopback command stops all loopback tests
or any selected loopback test currently active on the E1
NTU.
To abort one or more loopback tests,
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, select Abort.
F1
Loopback:
Abort
LLB PLB
F2 F3