Specifications

AT Command Set Reference
Ver. 1.00
GSM1308AT001 Page 152 Ver. 1.00 – 10/29/2008
2.3.1.19. AT&D DTR Usage
Command Function This command controls the Data Terminal
Ready signal.
Command Functional State Control
Group
Command Format Query N/A
Response N/A
Write Format AT&D<value>
Response OK
Read Format N/A
Response N/A
Execution Format N/A
Response N/A
Parameter Values
<value> 0 Ignore DTR
1 Modem switches from DATA to
COMMAND mode when DTR
switches to off
2 When DTR switches to off,
disconnect the call. Automatic
answer of voice and CSD call is
disabled while DTR remains off"
Reference GSM 07.05 and ITU-T v.25ter Section 6.2.9
Standard Scope Mandatory
Enfora Implementation Scope Partial
Notes N/A