Option Set 1-Async Calls To Central Site Using At Acu - Motorola 326X V.34 User Manual

Option Set 1—Async Calls to Central Site Using AT ACU
Changing Default Configuration Settings
Depending on application requirements, you may need to change the following:
• Buffer Delay (AT
buffered data in the communications link to be effectively transmitted to the
other modem before the modems disconnect. Enable this feature if your
application does not ensure a complete transfer of data before the modems
disconnect.
• When the 326X is configured for Option Set 1: if you do not use the AT ACU
to send commands to operate the modem, you must customize the DTE port by
selecting these options:
— DTE Rate. Set the modem's DTE rate to match the asynchronous DTE's
rate using the DTE Rate option (AT
— Parity. Set the modem's parity to match the parity set in the asynchro-
nous DTE using the Parity option (AT
— Character Length. Set the modem's character length (Char Length,
ACU OPTS category) to match the length set in the asynchronous DTE.
(Refer to Appendix A for parameter and setting descriptions.)
• In Option Set 1, the default settings assume you will use the AT ACU to oper-
ate the modem (for example, the default for ACU Select=AT; EIA signals are
set high). If you plan on using DTR transitions ("DTR Dialing") to signal the
modem to make a call (rather than AT Commands), do the following:
1) Set Default Dial=1 (AT
2) Store a number in memory location 1 (using Enter Phone #, AT&Z,
9600 T/D? category).
3) Set DTR=108.1 (AT&D, TERMINAL OPTS category). When DTR is
raised, the modem will dial the specified call.
• If the DTE does not require EIA signal pins to be held high, adjust the EIA
settings (TERMINAL OPTS category) to match your application requirements.
• In Option Set 1, the modem is set for XON/XOFF (software) flow control. If
your application requires hardware flow control, change the Flow setting
(AT FL, TERMINAL OPTS category).
*
DB, EC/DC OPTS category), when enabled, allows
*
*
* DA, ACU OPTS category).
DE, TERMINAL OPTS category).
* RP, ACU OPTS category).
Configuring the Modem 4-19