Motorola 326X V.34 User Manual page 138

Table A-1.
AT Commands, Cross-Referenced to Front Panel Options (Continued)
AT Parameter &
Command Option
Con Msg
*
AT CM0 =DTE Rate
*
AT CM1 =DCE Rate
*
AT CN1 – Enter Phone #
9,(phone no.)
=1–9
*
AT CT0/ CTS=High
AT&R1
*
AT CT1 =Normal
*
AT CT2 =ACU On
*
AT CT3/ =AsyncSync
AT&R0
*
AT CT4 =RTS
Default Dial
*
AT DA0 =Off
*
AT DA1 – 9 =1 – 9
Delay
*
AT DB0 =Off
*
AT DB1 =Buf or S38
*
AT DB2 =Buf & S38
Gray shading indicates country-specific options. See Appendix C for your country's options.
A-16 Configuration Quick Reference
Description
Connect Message
Selecting DTE Rate results in the current DTE rate being displayed on your terminal after the
connect message.
Selecting DCE Rate results in the current DCE rate being displayed on your terminal after the
connect message.
See the AT&Z command description.
CTS is always high. Use this setting if you plan to use RTS/CTS or DTR/CTS Flow control.
The modem controls CTS as in normal handshaking. In V.25bis ACU operation, CTS follows
DTR in command state; CTS is off in training/retraining and follows RTS in data mode.
For AT ACU operation, CTS follows RTS in command state; CTS is off in training/retraining
and follows RTS in data mode. If an ACU is not selected, CTS is low.
CTS is on in ACU mode, goes off during training/retraining, and follows RTS in data mode.
CTS is on in asynchronous mode, and off in synchronous, ACU mode. In synchronous data
transfer mode, CTS is off in training/retraining and follows RTS in data mode. When CTS
follows RTS in data mode, the setting of the RTS/CTS Delay option applies (if Mode=Direct).
CTS follows RTS. Use this setting if your application requires that CTS immediately follow
RTS. If one of these flow control methods is used: Flow=RTS/CTS or Flow=DTR/CTS, then
CTS does not follow RTS in a flow-off condition. When CTS=RTS, the RTS/CTS Delay
*
(AT DL) option is not available.
Default Dialing
The default dial feature is disabled.
The modem direct dials the telephone number stored in the memory address selected (memory
addresses 1 – 9) when one of the following conditions occurs:
•DTR=108.1 or Tail, and the DTE turns the DTR signal from off to on.
•DTR=108.2, Esc, Discon, Reset, or High; the DTR signal is on; and either the front panel
Talk/Data key ( at the Home position) is pressed, or control of the dial is switched to
the modem with an exclusion key telephone.
•ACU Select=AT, AT Form=DTR Dial, and the DTR signal transitions from off to on.
This option also determines the telephone number dialed during restoral.
Buffer Delay
The Off setting disables the Delay option.
This setting starts the buffer delay timer immediately upon detection of the disconnect request.
When the timer is operating, the modem continues to process either the transmit or receive
buffers. The modem disconnects when the buffers are empty or the timer expires, whichever
occurs first. NOTE: When the modem is set for Direct mode, no data buffering occurs and the
disconnect is immediate.
This setting prevents the timer from starting until either the transmit or receive buffers have
emptied. The modem then disconnects. Once the timer expires, when the modem is set to
Direct mode, data is not buffered and the timer starts immediately.