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Attachment A-5 Interface Control Document 1. SAMPLE Interface Name I Zetron 2616 The station alerting Interface will activate the City's existing Station Alerting System. The City utilizes Zetron which activates station alert activities (i.e., tones, lights, doors and safety features) through FILL - WAN, radio system, lease line telephone system, etc,. The Primary equipment, which controls this system, is located in the same room as the VisiCAD Servers and Message Switch. This Interface requires that the Station Alerting System be designed or modified to accept an electronic transmission from the VisiCAD Message Switch to activate alerts at the applicable stations. This interface is through a serial, LAN, WAN, etc connection. If a serial connection, the VisiCAD Message Switch will communicate to the Station Alerting equipment through a multi -serial port terminal server on the LAN. VisiCAD Command will identify stations that require alerting based on unit assignments for an incident. The VisiCAD Message Switch will activate the Station Alerting System by passing a defined message string to the Station Alerting System. The Station Alerting system will then manage the actual station TriTech System The Zetron Station Alerting System consists of two main components: the Model Interface 6 Fire Station Transponder and the Model 26 Status/Control Panel. The Model 6 resides in the fire station and provides an audio interface to the station's PA system, a data interface to digital 1/0, and visual status indicators. The Zetron Model 26 Status/Control Panel resides within the dispatch center. It has push buttons that represent individual fire stations, indicators lights for unit status, and a computer interface for automated dispatching. Under manual operation when a button is pressed, it dispatches (alerts) the proper fire stations. The resultant data packet signaling the alert is transmitted to the designated fire station Zetron Model 6, the alert is automatically acknowledged by the Zetron Model 6. If the alert is not received on the first transmission, the Zetron Model 26 resends the alert up to four times to ensure its successful receipt. The Zetron Model 6 has status buttons for the field user to select to change a unit's status within the CAD and indicate at the station the current status of the unit. The computer interface functions so that when a dispatcher within VisiCAD commits a unit or initial assignment of multiple units, the VisiCAD message switch (VMS) will identify the unit(s) and the station(s) the units are associated with. The VMS will upon identifying the station(s) and notify the Zetron Model 26 of those stations by sending it the appropriate hexadecimal message (Zetron defined data stream) which relates to the committed stations. An ACK will be returned from the Zetron Model 26 if the message transmission is successful. The interface will intercept this acknowledgement message and make an entry to the Activity Log that the ACK was received. If the VMS does not detect the acknowledgment, it will resubmit the data stream. The interface shall then wait for the field users to press the "Acknowledgement' button on the station Zetron Model 6, when this is received the interface shall make an entry to the activity log and the incident comments.