Rs-232-C "Null Modem" Cable For Direct Console Connection (Supplied With The Hub; Rs-232-C Modem Cable - HP AdvanceStack 10Base-T Hub-12 Installation And Reference Manual

Cables and Connectors
RS-232-C "Null Modem" Cable
for Direct Console Connection
(supplied with the hub)
PC end
9-pin female
2
3
5

RS-232-C Modem Cable

Modem end
25-pin male
A-10
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Hub end
9-pin female
2 Rx
3 Tx
5 GND
Hub end
9-pin female Signal
2 3 Tx
3 2 Rx
4 7 RTS
5 8 CTS
6 6 DSR
7 5 GND
8 1 CD OR DCD
20 4 DTR
22 9 RI
23 DRS – typically on V.24 (European) modems
(not connected)