DSU Operations
4-21
3610-A2-GB91-90
July 1999
For a DSU having either nondisruptive diagnostics or
rate adaption in effect, the following additional menu
displays for the active core:
F1
Port Number:
Prt1
Aggr
F2
F3
Results
The DSU does not generate the test results.
NOTE
When a DSU (control or tributary)
originates Remote Digital
Loopback, both the originating
DSU and the receiving DSU are in
Test mode: the originating DSU is
in RL and the targeted DSU is in
DL. No other test can be run at
the originating or receiving DSUs
until Remote Digital Loopback is
aborted.
Bilateral Loopback
Bilateral Loopback is a combination of DTE and
Digital Loopbacks operating simultaneously in the same
DSU, which is shown in Figure 4-8. Bilateral Loopback
(Bilat Lpbk) or Digital Loopback is a customer-selectable
configuration choice from the General (Gen)
configuration option set in
Chapter 6
.
NOTE
If the Bilat Lpbk (Bilateral
Loopback) configuration option is
enabled, requesting a Remote
Digital Loopback or Digital Test on
a port automatically initiates a
DTE Loopback on the port, as
well. Requesting an aggregate
Remote Digital Loopback or
Digital Loopback automatically
initiates a DTE Loopback on all of
the ports.
Figure 4-8. Bilateral Loopback
Содержание COMSPHERE 3610
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Страница 263: ...Troubleshooting G 3 3610 A2 GB91 90 July 1999 Figure G 2 No Signal NS Condition Troubleshooting ...
Страница 265: ...Troubleshooting G 5 3610 A2 GB91 90 July 1999 Figure G 4 Out of Frame OOF Condition Troubleshooting ...
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