HP A180 HP DTC Cabling and Racking Guide - Page 64
RS-232 Connection to modems
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7 RS-232 connection RS-232 Connection to modems This cabling scheme is recommended for connecting modems to a DTC. Existing HP cable: HP 40233A 25-pin male connector to DTC 1 - PGND 2 - RD 3 - TD 4 - DCD 5 - GPO 6 - DTR 7 - SGND 8 - RTS 9 - RI 20 - DSR 22 - CTS INPUT OUTPUT INPUT OUTPUT OUTPUT OUTPUT INPUT INPUT INPUT 25-pin male connector to modem 1 - PGND 3 - RD 2 - TD 8 - DCD OUTPUT INPUT OUTPUT 20 - DTR 7 - SGND 4 - RTS 22 - RI 6 - DSR 5 - CTS INPUT INPUT OUTPUT OUTPUT OUTPUT Note The DTC does not monitor the RI signal from the modem. 58
58
RS-232 connection
7
RS-232 Connection to modems
This cabling scheme is recommended for connecting modems to a DTC.
Note
The DTC does not monitor the RI signal from the modem.
Existing HP cable:
HP 40233A
25-pin male connector to DTC
1 - PGND
-
2 - RD
INPUT
3 - TD
OUTPUT
4 - DCD
INPUT
5 - GPO
OUTPUT
6 - DTR
OUTPUT
7 - SGND
-
8 - RTS
OUTPUT
9 - RI
INPUT
20 - DSR
INPUT
22 - CTS
INPUT
25-pin male connector to modem
1 - PGND
-
3 - RD
OUTPUT
2 - TD
INPUT
8 - DCD
OUTPUT
20 - DTR
INPUT
7 - SGND
-
4 - RTS
INPUT
22 - RI
OUTPUT
6 - DSR
OUTPUT
5 - CTS
OUTPUT