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Descriptions and non-contractual illustrations in this document are given as an indication only.
ERCOGENER reserves the right to make any modifications.
Dct_427_02
3.7 Audio chanel
The GenPro 400e is dedicated to 'Machine To Machine' (M2M) applications only.
ERCOGENER recommends the use of SIM card subscriptions of the 'Machine To Machine'
(M2M) type.
Video, VoIP (Voice over IP) transfer requires the payment of additional royalties.
The audio interface is available on the
GenPro 400e
via an audio codec. To activate the codec, use the
command
AT+UEXTDCONF=0,1
.
The audio interface is standard to connect a telephone handset (the command AT+USPM) allows the
selection of the Handset, cf the document AT Command List available on ercogener website.
The echo cancelation (see command AT+UMGC) and particularities of sound reduction are also available to
improve the audio quality in the case of a free-hand application.
They already include the functionality for a microphone like Electret (1 mA and 1,55 Volts). These
connections allow an easy cabling to a telephone handset.
3.7.1
Synoptic of audio string
Figure 12 : Synoptic of audio string
The different parameters of the audio string can be adjusted with AT commands, mainly:
•
AT+USPM
•
AT+UI2S
•
AT+CMER
•
AT+UMCLK
•
AT+UI2C
For more information, see the document AT Command List.