HP Model 712/100 - Workstation Technical Reference Manual page 45

HP A4015A X.25/Serial Card
Description
Features
X.25
X.25 supports 1.2 to 19kbs.
X.25 supports implementation of the LAP–B data–link protocol
Pin No. Signal
1 Prot. Ground
2 TXD
3 RXD
4 RTS
5 CTS
6 DSR
7 Signal Ground
8 DCD
9 Not Connected
Serial
EIA RS–232–C (CCITT V.28/V.24 460.8 Kbps with CTS/RTS) compatibility
Modem control
Supports data transfer rates up to 454k baud
Software selectable parity configuration
Software selectable baud rate
Interrupt capability through status or modem signal lines
9–pin male D–sub connector
Pin No. Signal
1 DCD
2 RXD
3 TXD
Physical Specifications
Pin No. Signal
10 Not Connected
11 Not Connected
12 Not Connected
13 Not Connected
14 Not Connected
15 TCLK
16 Not Connected
17 RCLK
Pin No. Signal
4 DTR
5 Ground
6 DSR
Pin No. Signal
18 Not Connected
19 Not Connected
20 DTR
21 Not Connected
22 Not Connected
23 Not Connected
24 TTE
25 Not Connected
Pin No. Signal
7 RTS
8 CTS
9 RI