Connector For The Voice Management - Digicom pocket GSM User Manual

PocketGSM

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)
The modem includes AC coupling and biasing for electret microphone.
Suggested characteristics for the microphone
Polarizzazione :
Impedance:
Sensitivity :
SNR (Signal to Noise Ratio) : > 50dBm
Suggested characteristics for the speaker
Type :
Impedance :
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 ]
1 Microphone ( + )
2 Speaker ( + )
3 Speaker ( - )
4 Microphone ( - )
2V – 0.5mA
2KΩ
from –40dBm to –50dBm
10mW, electro-magnetic
from 32 to 150 Ω
2.6
Installation