User Manual

4. AUDIO
129
LZT 123 7263 R1A
4.3 AT*EALR Ericsson Audio Line Request
The AT*EALR command is used by accessories to request the ATMS
and AFMS. The command includes two parameters; <mode> and
<activation>. The <mode> parameter sets which audio lines are
requested and the <activation> parameter is used to indicate if the
accessory wants to be activated directly or not. Direct activation means
the accessory gets the audio lines immediately if a call is established
from the MS (i.e. keypad, voice recognition). If the accessory doesn't
request direct activation, it has to indicate to the MS when it wants to
get the audio lines (e.g. using AT commands).
The <audio status> parameter is used to demand the audio lines.
This command enables the unsolicited result code
*EALV:<mode>,<activation>,<resp> which is sent to the application
when the module wants it to change audio state.
Description Command Possible Responses
Request the audio lines
(ATMS,AFMS)
AT*EALR=<mode>[,<ac
tivation>[,<aud_status>
]]
•*EALR:<mode>,
<activation>,<resp>
•OK
•ERROR
Show the current
setting
AT*EALR? *EALR:
<mode>,<activation>,
<resp>
Show list of supported
parameters
AT*EALR=? *EALR:(list of supported
<mode>s,
<activation>s and
<aud_status>s
parameters)
<mode > Description
0 No request for ATMS or AFMS
1 Request ATMS and not AFMS
2 RequestAFMSandnotATMS
3 Request ATMS and AFMS
<activation > Description
0 Not direct activated audio accessory (e.g. cordless
portable hands free)
1 Direct activated audio accessory (e.g. vehicle hands
free)