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GC868-DUAL EVK2 User Guide
1vv0300803 Rev.1- May 2009
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved
page 26
of 55
10.2.1 Speaker and Stand-alone Microphone
If you are using a Speaker, you can connect a
stand-alone electrete microphone
by a coaxial
2,5mm plug to SO401, respecting the following pin-out.
3
1= MIC +
2= N.C.
3= MIC -
1
2
Figure 17: Electrete Microphone Plug Connection
Figure 18:
Speaker & Electret Microphone
case insertion
Microphone
speakmic.skd
SPEAKER
Speaker
C
S
11
39
STACKED
RS232
USB
RS232
1
40
39
1
AUDIO 2
AUDIO 1
30
29
P
L1