New Federal IDAS
Trunked System
Recently, a friendly
source in the Seattle, Washington area passed along information on what
appeared to be a new, three-site IDAS trunked system in the Puget Sound area. IDAS
stands for Icom Digital Advanced System, which is an Icom trunked protocol
using the NXDN open standard developed by Icom and Kenwood.
The frequencies
that have been identified with this system are 408.0375 MHz, 408.4250 MHz and
410.3250 MHz. So far, the system has only revealed these three original site
frequencies that were first noted. The frequencies are all using NXDN digital
mode, so they can be monitored with the TRX models of Whistler scanners or
using SDR radios with the appropriate software. The three sites all seem to
carry the same voice traffic simultaneously.
By listening for
several days, it was determined that the likely user was the Department of
Veterans Affairs Medical Centers. There are two VA Medical Centers in the
Seattle area – the American Lake facility in Tacoma, Washington and the Seattle
facility in Seattle, Washington. https://www.pugetsound.va.gov/locations/directions.asp
So far, the IDAS
trunked system appears to be used by maintenance and shuttle transportation. VA
Security has been reportedly using UHF P-25 repeaters at the Seattle area VA
facilities, but has also been reported to have talk groups on the federal VHF
Integrated Wireless Network (IWN) trunked system that supports a majority of
federal agencies in the region.
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