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D.C. FIRE FINALLY GOING DIGITAL? New system could shut-out scanner listeners by Alan Henney (alan@henney.com)
After months of delays, the cut-over to a digital 800 MHz trunked radio system for the District's fire and EMS workers may be completed by year's end, says Wendell Giggy of D.C. Fire/EMS communications. D.C. Fire Chief Ronnie Few mandated December 15 as the switch-over date. Until a digital scanning radio is available, scanner listeners will be unable to monitor the new system.
Scanner listeners will continue to hear dispatches on 154.19, but Giggy noted that as of this writing the department has no plans to simulcast other talkgroups onto the VHF channels or the Internet from the digital system. In addition, he says no plans have been made for public/media access to monitor the system.
The city's Emergency Management Agency (EMA) and some fire department staff have been using the system already for more than a year. EMA and fire/EMS each procured separate eight-channel trunked systems. They now operate as a single system with two partitions. EMA remains on its eight channels and fire/EMS will normally use its own eight 852 MHz channels but may expand into the EMA allocations if necessary, but not the other way around. EMA is in the process of assisting other city agencies, such as housing, corrections, schools and human services, in moving to the EMA portion of the trunked system.
The 800 MHz system will also support a DEK (direct-entry keypad) status messaging system for the fire/EMS apparatus. The DEK status messaging system will reduce voice traffic since fire/EMS personnel can simply press a button to notify communications when they arrive on scene, are available, responding, etc. Hospital and firehouse alerting systems will also run through the trunked system. Look for the new white fiberglass antennas about a foot tall on each firehouse.
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The hub of the trunked system is the new communications center on McMillan Drive NW which is adjacent to the existing fire/EMS dispatch facility. It was supposed to have been a consolidated facility where the city's various emergency call centers were to be located. But Giggy says the city is considering building even a larger facility at an undetermined location. That facility would ideally house the police and fire/EMS call-takers and dispatchers along with call centers for other city agencies such as public works, EMA and perhaps human services.
The police may join the existing center in the next year, wait for the new proposed facility to be built, or remain on Indiana Avenue. As far as radios, the police say the department would like to upgrade its existing 460 MHz system and not move to the fire/EMS/EMA trunked system. MPD dispatchers, however, may have the ability to patch into selected talkgroups as required.
A new computer-aided dispatch (CAD) system is being installed by the Intergraph Corporation for fire/EMS dispatchers and call-takers. It's a Windows NT-based system that replaces the department's 11-year-old CAD system which runs off a McDonnell Douglas mainframe. The new CAD system is capable of sending dispatch messages to alphanumeric pagers -- similar to what Baltimore and Montgomery County fire departments already do. But Giggy said no decision has been made whether to implement this feature or not.
The fire/EMS/EMA system has transmit sites at the Capitol View Plaza Senior Center, Saint Elizabeth's Hospital, Georgetown University Medical Center, the 4th District MPD police station, and a fifth site at fire communications where the controller is located. The department, Giggy stated, is working with Metro on perfecting the system used in the subway tunnels.
A fire department official told the Washington Times that Nextel's signals interfere with the trunked system's signal and hamper efforts to complete the radio link for use in the subway tunnels. Metro's safety chief was quoted as
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