AFAIK, no - they are not required to use 4.9 GHz exclusively. Although reguirements will vary depending on the group's needs and the recommendations of their techical people, there is no regulation that I know of that would prevent them from using the license-free frequency bands where they deem it appropriate. Other folks on this list may have other, more-specific information.


chris cooper wrote:

If a first responder organization succeeds in getting homeland security
funding, are they required to build an entirely 4.9 network?  The folks
I have talked with have this vision of having interconnected 4.9
networks that all first responders can connect to and that these
networks will at some point be linked on at least a regional basis, all
on 4.9 so that all can communicate together.  The problem is, terrain
and penetration severely limit usefulness of 4.9 Aps.  Are they
permitted to build hybrid 900/4.9 networks?



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