Page 24 - Appendix B: SPOT Connectors
SPOT 3 User's Guide
Appendix B: SPOT Connectors
SPOT Serial Cable
The SPOT serial cable is permanently wired into SPOT at
the telephone end. The other end is terminated with a
standard 9-pin female D-type plug for connection to the
PC.
Serial Cable Pinouts at Computer End
Signal
Description
9-way
25-way
DCD
Data Carrier Detect
1
8
RXD
Received Data
2
3
TXD
Transmitted Data
3
2
DTR
Data Terminal Ready
4
20
–
Signal ground
5
7
DSR
Data Set Ready
6
6
RTS
Ready To Signal
7
4
CTS
Clear To Signal
8
5
RI
Ring Indicator (Not used)
9
22
Telephone Cable
The SPOT line cord is terminated on one end with an RJ11
type socket that is inserted into the base of SPOT, the other
end is terminated with a BS6312 style plug intended to be
plugged into a socket of the same type. If you do not have
a socket of suitable type please contact your telephone
service provider. The pinout of the plug is as follows:
Pin
Wire
Signal
Pin 1
Not used –
Pin 2
White
Line
Pin 3
Green
Pin 4
Blue
Pin 5
Red
Line
Pin 6
Not used –
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