4. Maintenance
4-28
February 2001
3160-A2-GB21-90
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.
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, Valid Loopback Combinations
, 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.
Procedure
To perform a Data Terminal loopback:
1. From the top-level menu screen, select Test.
2. From the Test screen, select Lpbk.
3. From the Loopback screen, press the
key until the DTLB selection appears
on the screen.
F1
F2
F3
Loopback: DCLB
Prt1 Prt2 Prt3
496-14314-02
CSU
DSU
NETWORK
INTERFACE
DTE
(DSX-1)
ALL 1s
DTLB
DTLB
PORT 1
PORT 2
F1
F2
F3
Test:
Rlpbk Lpbk Ptrns
Содержание 3160-A3
Страница 16: ...About This Guide x February 2001 3160 A2 GB21 90...
Страница 24: ...1 Introduction 1 8 February 2001 3160 A2 GB21 90...
Страница 100: ...3 Operation 3 66 February 2001 3160 A2 GB21 90...
Страница 142: ...A Front Panel Menu A 2 February 2001 3160 A2 GB21 90...
Страница 198: ...C Configuration Options C 54 February 2001 3160 A2 GB21 90...
Страница 246: ...E SNMP MIB Objects E 32 February 2001 3160 A2 GB21 90...
Страница 280: ...H Asynchronous Terminal Operation H 24 February 2001 3160 A2 GB21 90...
Страница 282: ...I Equipment List I 2 February 2001 3160 A2 GB21 90...