Description
• The C900 is designed to link an alarm panel’s digital dialer to a
host computer by connecting one side to the Public Switched
Telephone Network (PSTN) and the digital dialer’s telco inter-
face, and the other side to the host computer’s RS-232 serial
port.
• When the dialer has something to report, the C900 provides the
signals and voltages necessary to simulate a connection to the
central station through a PSTN. The C900 then decodes the
transmitted digital dialer message and presents the decoded sig-
nals to the host computer. When the host computer acknowl-
edges receipt of the message, the C900 transmits an appropri-
ate acknowledge message to the dialer. True end-to-end secu-
rity is maintained in this manner.
• The C900 has two RJ45 jacks. One is labeled “TELCO”, and is
intended for connection to an RJ31X jack. The other is labeled
“PANEL”, and it is intended for connection to a digital dialer via
a telco cord. In “Intercept Mode,” the C900 connects the house
phone directly to the telephone company, and connects the
digital dialer to its internal telco simulation electronics. In
“Fallback Mode,” the C900 connects the house phone to the
dialer, and the dialer to the telephone company, shunting itself
out of the phone circuit. Intercept Mode is maintained only if
the C900 CPU is functioning (Output 1 held low). “Fallback
Mode” is thus ensured in the event of a CPU lockup.
New with one year warranty.
Product Code: D900
