0049-1800-xxx 326X V.34, V.34-SDC and V.32bis Series Modem – USER’S GUIDE 02/23/2010
Rev. A
Page 62
of
205
Option Set 4 – Synchronous Leased Line Applications with Dial Restoral (Models
3261/63/66/68)
Changing Default Configuration Settings
Depending on application requirements, you may change the following options:
•
The default
Restoral
setting in Option Set 4 (leased line models) is Auto/FP. When first
configuring the modem, set
Restoral
=Off. This prevents erroneous status errors from
displaying while you configure leased line options. After configuration, if your application
requires automatic initiation of dial restoral, set
Restoral
=Auto/FP.
•
When installing the modem in a leased line application, the default
Mode
setting (AT*CA,
MODULATION OPTS category) is Answer.
For proper operation, you must set
Mode=Answer in one modem, and Mode=Originate in the other modem.
•
Depending on application requirements, you may change the following:
o
Line (MODULATION OPTS).
Default option is 2W Lease. Can also be set for 4W
Lease application.
o
No ACU Form (ACU OPTS).
Default option is Sync. Can be set to Async.
o
Answer (ACU OPTS).
Default option is country-specific. Refer to Appendix C to verify
that this option is appropriate for your application.
o
Restoral (RESTORAL OPTS).
Default option is Auto/FP (as described above). Can be
set to OFF to disable restoral.
o
Clock (MODULATION OPTS).
Default option is Internal. Can be set to external or
loopback, depending on the network clocking source.
o
DTE (TERMINAL OPTS).
If
No ACU Form
=Async, customize your DTE port by
selecting these options:
Set the modem’s DTE rate to match the asynchronous DTE’s rate using
DTE
Rate
(AT*DE, TERMINAL OPTS category).
Set the modem’s parity to match the parity set in the asynchronous DTE using
Parity
(AT*RP, ACU OPTS category).
Set the modem’s character length to match the character length set in the
asynchronous DTE, using
Char Length
(ACU OPTS category).
(Refer to Appendix A for parameter and setting descriptions.)
326XFAST-SDC MODEM APPLICATION EXAMPLES
This section provides application examples for each SDC option set, and notes options you may need to
change from factory default settings for each option set. This section includes the following:
-
SDC Pre-Operation Notes
– read this
before
configuring the modem
-
Configuring The Modem for SDC Operation
– configuration options that are
critical
to
ensure optimum network performance on an SDC connection
-
SDC Sample Applications
– examples of common SDC applications