Rainbow Electronics GM862-GPS - Manual (Page 22)

GM862-GPS Software User Guide
1vv0300729 Rev. 5 - 05/07/07
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2.6 Placing a Voice call
Before a voice call can be placed, it is recommended to check if the mobile is registered on a network
(see par. 2.5.3.1) and if the signal strength is enough to ensure a call can be made (see par. 2.5.3.2).
2.6.1 Voice call device set up
2.6.1.1 Set the device in voice mode
•
Send command
AT+FCLASS=8<cr>
•
wait for OK response
NOTE: This command may be omitted if the modifier ";" is added at the end of the ATD command
after the number to be dialed.
2.6.1.2 Set the desired audio path active
The GM862-GPS has two different audio paths:
- internal microphone/ear (MT)
- external microphone/ear (HF)
Usually the internal path is used for a handset function, while the external is used for handsfree
function. There are two way to switch between these two paths:
- SOFTWARE: by using the command AT#CAP= <n> (with n=1 OR n=2)
- HARDWARE: by setting AT#CAP=0 and setting the AXE input high (internal MT) or low (external
HF).
If only one path is needed, then it is preferable to use the internal one (MT).
TIP: when Hardware control is not needed AXE pin can be left unconnected.
TIP: the audio paths can be switched also during a call in both ways.
•
Send command AT#CAP=<n><cr>
where:
<n> = 0 for HARDWARE control with AXE input
<n> = 1 for external HF path (regardless of the AXE input status)
<n> = 2 for internal MT path (regardless of the AXE input status)
•
wait for
OK
response