Digicom Pocket AL I/O Manual de usuario descargar pdf (Pagina 32)

PocketGSM Installation

2.6

2.6. CONNECTOR FOR THE VOICE MANAGEMENT

For the voice functionality, Pocket GSM is equipped with a double ended audio interface

on RJ6 female connector with the same Pin-out of a standard telephone handset

The interface can be connected both to a handset or to a loud speaking telephone.

VOICE connector Pin-Out (RJ6)

1 Microphone ( + )

2 Speaker ( + )

3 Speaker ( - )

4 Microphone ( - )

The modem includes AC coupling and biasing for electret microphone.

Suggested characteristics for the microphone

Polarizzazione : 2V – 0.5mA

Impedance: 2KΩ

Sensitivity : from –40dBm to –50dBm

SNR (Signal to Noise Ratio) : > 50dBm

Suggested characteristics for the speaker

Type : 10mW, electro-magnetic

Impedance : from 32 to 150 Ω

Suggest configuration

AT+SPEAKER=0

AT+ECHO=0

AT+SIDET=1,3

[ For further information see the chapter “AT Commands” present in the user’s manual on Digicom

website ]

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Digicom Pocket AL I/O Manual de usuario Pagina 32