EG_GenLoc41e_1055_UG_003_UK
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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
7.7 WatchDog
The Hardware WatchDog function allows the surveillance of the modem software activity: the Software
management of the WatchDog is implanted in the embedded application by default. In the case of a
development (EGM) it must be implanted in the embedded application of the final customer.
If the software activity is interrupted, the WatchDog component starts a hardware Reset.
The WatchDog function is active only if the SIM card is present.
7.8 Audio
The modem contains the EGM standard library (see the documents "EG_EGM_CL_xxx_yy" of
ERCOGENER); in this case, 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 "EG_EGM_CL_xxx_yy" of ERCOGENER).
ERCOGENER advises 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).
Designation
SUBD 9 F
SUBD 15 M-HD
DCD/Buzzer(*)
1
1
RXD
2
6
TXD
3
2
DTR
4
8
GND
5
9
DSR
6
7
RTS
7
12
CTS
8
11
RI/3.8V(*)
9
13
RJ9
Micro +
1
4
S
2
10
Speaker -
3
15
Micro -
4
5
* By default
