0049-1800-xxx 326X V.34, V.34-SDC and V.32bis Series Modem – USER’S GUIDE 02/23/2010
Rev. A
Page 98
of
205
Initiating and Terminating Tests from the Modem’s Front Panel
To initiate a test from the modem’s front panel:
1)
Press
until you reach the TEST OPTS category.
2)
Press
until you reach Test=End Test.
3)
Press
until Test=LAL (for example)
4)
Press
to start the test.
To initiate a test from the modem’s front panel:
1)
Press
until
Test
=End Test.
2)
Press
to stop the test.
Synchronous Data Compression (SDC) Testing
When performing diagnostic tests in SDC mode, note the following:
•
All tests are supported
•
When initiating the following “online” tests:
o
Remote digital loopback
o
Remote digital loopback pattern
o
Data mode pattern
o
Local digital loopback
During SDC connection, the modem falls back to Direct mode (
Mode
=Direct, AT
*
SM) to run
the test. If the modem is set for internal timing (
Clock
=Internal, AT&X) the DTE clock is
changed to match the DTE rate. If the modem is set for external timing (
Clock
=External,
AT&X), the clock rate provided may not match the DCE rate and the test will not function.
(Set
Clock
=Internal temporarily to complete testing, and then reset to External.)
•
To test the synchronous data path’s integrity while running loopback tests, set the modem for
one of the asynchronous buffered modes (Mode=Normal, Reliable, Auto Reliable, or Speed Auto
Reliable).
