HS 2000 System Administrator’s Handbook
Chapter 5. Troubleshooting
Running a loopback test
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Press one of the buttons in the Communications window to select the
loopback mode you need. The following table describes each mode.
Loopback mode
Description
Internal Loopback
(valid only when not in
a conference)
Diagnostic test that verifies that the ESA
system boards and expansion unit are working
correctly.
With internal loopback, you see yourself
(the local view) on the main monitor.
The local signal is sent back to you and
to the remote site.
This test must be performed when a call
is not in progress.
Local Loopback
(valid only when in a
conference)
Diagnostic test within the local ESA system.
Returns the remote site’s communication
signal to the remote site.
The remote site can put your local system
into local loopback mode.
The local site sees the local site; the remote
site sees the remote site.
When you run a local loopback test during
a VTEL HDLC call, the test functions
regardless of whether auto configuration
is enabled or not.
The local loopback test is not for use during
an H.221 call.
After you run the local loopback test, turn
Local Loopback off before you hang up.
