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GT47-GR47 Signal Cross-reference Table B
3.3 Audio Connector
LZT 123 7607 R1B
3. ELECTRICAL DESCRIPTION
GT47 / GT48
GT47
GT Alternative
Pin
signal
HD15 Connector
1
OUT-6
2
3
4
TD-2
5
RD-2
6
OUT-7
7
IN-4
8
OUT-8
9
OUT-5
10
OUT-9
11
RTS-2
12
CTS-2
13
IN-5
14
15
A 4-way RJ9 connector, as shown below, allows a telephone handset to be
plugged into the GT47, giving access to the microphone and earpiece
signals. The connector may also be used to drive other analogue audio sub-
systems or devices.
The module is configured to work with a range of handsets. If necessary,
changes can be made to the characteristics of the audio interface by sending
the GT47 appropriate AT commands.
Relationship to
GR47/GR48 engine
Dir.
Pin Corresponding
GR47 Signal
O
38
O1
I
42
O
41
I
43
TD3
O
44
RD3
O
32
O3
I
39
IO9
O
40
O4
O
20
DAC
O
36
O2
I
24
IO4
O
23
IO3
I
37
IN1
22
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