The RECEIVER/PRINTER shall be connected to a regular dial-up telephone network. The receiver shall be in a stand by mode until a ring signal occurs on the telephone line. When a ring signal is detected, the receiver shall:
Automatically answer the call, send a 2100 Hz tone to the transmitter.
If the data signals are not detected with five seconds the receiver shall terminate the call (hang-up) and return to standby mode
If the data signals are detected, the receiver shall process all incoming signals and check the message for accuracy.
If the incoming message is not correct, the receiver shall terminate the call in such a manner that will cause the transmitter to call back and re-transmit the message.
If the incoming message is accurate,
the receiver shall:
a. Print the time, date, and station identifier of the
calling transmitter.
b. Print all alarm conditions which are transmitted.
Multiple alarms are transmitter on the same telephone
call.
c. Sound an audible alarm on alarm conditions.
d. Process the calls automatically on status reporting
conditions.
The receiver shall be capable of receiving up to eight conditions plus restored on any single call.
The maximum time laps from answering to printing shall be 10 seconds in all cases.
All alarm and supervisory conditions shall be capable of being printed in English works.
The printed alarm descriptions shall be a minimum of 32 characters per alarm description.
The customer may select from three formats. The Supervisory" format shall automatically process and print the alarm condition(s).
Supervisory" and Supervisory Audible" require operator intervention on incoming calls.
Provisions shall exist which will activate a dry contact on the receiver in the event a Priority" alarm is received by the unit and not manually acknowledged within 30 seconds of the call. This contact may be used to activate a local alarm or activate an automatic telephone dialer to alert the necessary personnel in such an event.
If the alarm message is acknowledged by the attending personnel within the 30 seconds when in the Priority" mode, the receiver shall transmit a "Message received" signal to the transmitter, this shall cause the transmitter to cease dialing the receiver on this alarm message.
The system as specified herein shall have an RS-232 connector on the rear of the unit.
In addition the system shall provide a computer interface to transmit the received data to a computer system if required.
The system shall have provisions for reviewing the most recent 64 incoming alarm messages.
The receiver/printer system shall operate on 12 VDC and shall be connected to the 115 VAC line through a 16 VDC transformer.
Updated 3/98