Telenetics 56 User Manual

Page 64

AT Commands

Page 56

OK = 0 (SmartSCM

ERROR Otherwise.

&Q - Sync/Async Mode

This command is an extension of the &M command and is used to control the connection
modes permitted. It is used with S36 and S48. (Also, see \N.)

NOTE: When the &Q0 to &Q3 command is issued to select the mode, the subsequent
connect message will report the DCE speed regardless of the W command and S95
settings.

Syntax

Defined Values

Decimal number corresponding to the option.

0 0 Selects direct asynchronous operation. The value

000b is written to S27 bits 3, 1, and 0, respectively.
See &M0.

1 Selects synchronous connect mode with async off-line

command mode. The value 001b is written to S27 bits
3, 1, and 0, respectively. See &M1. (Serial interface
operation only.) (SmartACF and SmartACFL only.)

2 Selects synchronous connect mode with async off-line

command mode and enables DTR dialing of directory
0. The value 010b is written to S27 bits 3, 1, and 0,
respectively. See &M2. (Serial interface operation
only.) (SmartACF and SmartACFL only.)

3 Selects synchronous connect mode with async off-line

command mode and enables DTR to act as Talk/Data
switch. The value 011b is written to S27 bits 3, 1, and
0, respectively. See &M3. (Serial interface operation
only.) (SmartACF and SmartACFL only.)

4 The modem will try to negotiate an error-corrected link.

The modem can be configured using S36 to determine
whether a failure will result in the modem returning on-
hook or will result in fallback to an asynchronous
connection. The value 101b is written to S27 bits 3, 1,
and 0, respectively. (Default.)

5 Selects asynchronous operation in normal mode

(speed buffering). The value 110b is written to S27 bits
3, 1, and 0, respectively.

Result Codes

OK = 0 to 3, 5, or 6 (SmartACF and SmartACFL only)
OK = 0, 5, or 6 (SmartSCM only)

ERROR Otherwise.