Modem Serial Port Specifications; Modem Serial Port Pinouts - HP StorageWorks 2/64 - Core Switch Installation Manual

Table 24 Terminal serial port pinouts
Pin
8
9

Modem serial port specifications

Each CP card has a modem serial port (labeled RS-232) with a fully RS-232 compliant DB-9
connector.
NOTE: For dust and electrostatic discharge (ESD) protection, keep the cover on the serial port
whenever the port is not in use.
The modem port can be used for attaching a modem to each CP card. The Core Switch 2/64
and SAN Director 2/128 detect modems only during the power-on or reboot sequences, and
automatically initializes them for operation. If modems are connected to an operating switch, a
power on/off cycle, reboot, or fast reboot is required to detect the modem(s).
If both modems are connected to the telephone line by a Y cable, the active CP card answers
on the first ring; if the active CP card fails to answer, the standby CP card answers on the
seventh ring.
The pinouts for the modem serial port are shown in
Table 25

Modem serial port pinouts

Pin
1
2
3
4
5
6
7
Signal Description
---- ----
---- ----
Signal Description
DCD Data Carrier Detect
RxData Receive Data
TxData Transmit Data
DTR Data Term Ready
GND Logic Ground
DSR Data Set Ready
RTS Request to Send
Core Switch 2/64 and SAN Director 2/128 installation guide
Table 25.
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