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Connecting to the Unit
Serial (RS232) port
The PT22 is equipped with an RJ45 Serial RS-232 port for attachment to a PC or networked terminal
server using the supplied RJ45 to RJ45 crossover cable and RJ45 to DB9F serial port adapter as
required. See Power Ratings in Appendix C: Technical Specifications for more information on the
Serial RS-232 port.
Ethernet port
The PT22 is equipped with an RJ45 10/100Base-T Ethernet port for attachment to an existing network.
This connection allows access to the Switched PT22 via Telnet or HTML.
The PT22 is configured with the following network defaults to allow unit configuration out-of-the-box
through either Telnet or HTML:
• IP address: 192.168.1.254
• Subnet Mask: 255.255.255.0
• Gateway: 192.168.1.1
The local PC network connection must be configured as noted below:
NOTE: Contact your system administrator for instructions in reconfiguring the network connection. Reconfiguration of
your network connection may require a restart to take effect.
• IP address: 192.168.1.x (where x is 2-253)
• Subnet Mask: 255.255.255.0
Modem port
The PT22 is equipped with a DB9 male Modem serial port for connection to an external modem using
the supplied DB9 female to DB25 male serial cable. See Power Ratings in Appendix C: Technical
Specifications more information on the Modem port.
8 • Installation Sentry PT22
Installation and Operations Manual