Specifications

Modem Status, Customization, and Reset Commands
Rev. 8 May.12 Proprietary and Confidential 51
!DTMEN
Supporting chipsets:
• All
Note: Only the execution
operation (“=”) is password-
protected.
Enable/disable Dual Transfer Mode stack functionality
Enable or disable Dual Transfer Mode (DTM) and Enhanced DTM (EDTM) functionality
in the stack.
Note: The command is only available on devices that support DTM. The second
parameter (<enableEDTM>) is only available if EDTM is also supported.
Usage:
• Execution: AT!DTMEN=<enableDTM> (if EDTM is not supported)
or AT!DTMEN=<enableDTM, <enableEDTM> (if EDTM is not supported)
Response:
OK
Purpose: Enables or disables DTM, and EDTM (if supported).
• Query: AT!DTMEN?
Response:
!DTMEN: (if EDTM is not supported)
<enableDTM>
OK
or !DTMEN: (if EDTM is supported)
DTM: 01
EDTM: 01
OK
Purpose: Indicates the current state (disabled/enabled) of DTM and, if
supported, EDTM support. If the command returns ERROR, DTM and
EDTM are assumed to be enabled.
• Query list: AT!DTMEN=?
Purpose: Returns a list of valid <enableDTM> and, if supported, valid
<enableEDTM> values.
Parameters:
<enableDTM> (Enable/disable Dual Transfer Mode)
• 0 = Disable DTM
• 1 = Enable DTM (Default) — Value used for normal operations.
<enableEDTM> (Enable/disable Enhanced Dual Transfer Mode)
• 0 = Disable EDTM
• 1 = Enable EDTM (Default) — Value used for normal operations.
Table 3-2: Modem status, customization, and reset commands (Continued)
Command Description