User guide
Table Of Contents
- Presentation
- Warning
- Copyright
- 1 References
- 2 Packaging
- 3 General presentation
- 4 Characteristics and Services
- 5 Use of the modem
- 5.1 Starting with the modem
- 5.2 Specific recommendations for the use of the modem in vehicles
- 5.3 GSM led of the modem
- 5.4 Echo function of AT commands deactivated
- 5.5 Checking the quality of the GSM reception signal
- 5.6 Verification of PIN code
- 5.7 Verification of modem registration on GSM network
- 5.8 Verification of modem registration on GPRS network
- 5.9 Verification of internal voltages of the modem
- 5.10 Main AT commands (HAYES)
- 5.11 Turning OFF the modem
- 5.12 Updating procedure of the modem
- 6 Trouble Shooting
- 7 Functional description
- 8 Technical characteristics
- 8.1 Mechanical characteristics
- 8.2 Electrical characteristics
- 8.3 Environmental characteristics
- 8.4 Standards/Conformities
- 9 Security recommendations
- 10 Recommended accessories
- 11 Client support
EG_GenPro25e_1055_UG_000_UK Page 48 / 66
Descriptions and non-contractual illustrations in this document are given as an indication only.
ERCO & GENER reserves the right to make any modification.
Dct_427_01
7.8 Audio
The modem contains the transparent mode application. The audio interface is standard to connect an
equipment like a telephone handset.
The echo cancelation (command AT+UMGC) and noise reduction features are also available in order to
improve the audio quality in the case of free-hand applications.
The audio interface is standard to connect a telephone handset (the command AT+UHFP allows the
Handset selection, see the document "u-blox_AT_Commands_Manual_xxx.pdf"
ERCO & GENER recommends the use of the cable DATA/AUDIO Sub D 9pts Fem / Sub HD 15pts Male /
RJ9 (order code 4404000205) and a telephone handset (order code 3153400000).
Table 24 : Audio cable pins
Designation SUBD 9 F SUBD 15 M-HD
DCD 1 1
RXD 2 6
TXD 3 2
DTR 4 8
GND 5 9
DSR 6 7
RTS 7 12
CTS 8 11
RI 9 13
RJ9
Micro + 1 4
Speaker + 2 10
Speaker - 3 15
Micro - 4 5