Filter
Top Products
Loop-Around Data Test Arrangement
Issue 2 November 1996
D-11
If the user is successful in connecting to the Test Arrangement (the data typed
in is echoing back) then be assured that the user’s desktop equipment and
connection through the switch are functioning correctly. Help Desk personnel
can than look elsewhere for the problem, saving valuable time in trouble
isolation.
A Loop-Around Data Test Arrangement can also be useful for modem pool calls.
An off-premises user having trouble connecting to a host can call to use the
Loop-Around Data Test Arrangement (see Figure D-7). Again, if the call
succeeds, the problem is not in the modem pool.
Figure D-7. Using the Loop-Around Data Test Arrangement with Modem
Pooling
The Loop-Around Data Test Arrangement is also useful for isolating problems in
networks of digitally connected switches. The scenario is a user at one site
needing to access a host at another site and having problems. The user is
instructed by the Help Desk to call the local Loop-Around Data Test
Term inal
DEFINITY
DCP
8400B Plus
Host
Data Module
Loopback
Plug
Modem
Pool
Network
or ADU
Communications
System
G3V2 or
later
Two-Wire
Loop-Around Data
Test Arrangement
Modem
or
PC