Rainbow Electronics GE863-GPS low power - Manual (Page 24)

GE863-GPS Software User Guide
1vv0300724 Rev. 3 - 05/07/07
Reproduction forbidden w ithout Telit Communications S.p.A. w ritten authorization - All Rights Reserved page 24 of 122
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.
2.6.1 Voice call device set up
2.6.1.1 Set the device in voice mode
•
Send command AT+FCLASS=8
•
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 GE863-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= (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=
where:
= 0 for HARDWARE control with AXE input
= 1 for external HF path (regardless of the AXE input status)
= 2 for internal MT path (regardless of the AXE input status)
•
wait for OK response