Serial Connector Pin Assignments - Compaq LTE Elite Maintenance And Service Manual

3 Data Bit 1
4 Data Bit 2
5 Data Bit 3
6 Data Bit 4
7 Data Bit 5
8 Data Bit 6
9 Data Bit 7
10 Acknowledge *
11 Busy
12 Paper Out
13 Select
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Table A-2. Serial Connector
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Pin Signal
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1 Carrier Detect
2 Receive Data
3 Transmit Data
4 Data Terminal Ready
5 Ground
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16 Initialize Printer *
17 Select In *
18 Ground
19 Ground
20 Ground
21 Ground
22 Ground
23 Ground
24 Ground
25 Ground
Shell Ground
Pin Signal
6 Data Set Ready
7 Ready to Send
8 Clear to Send
9 Ring Indicator
Shell Ground