Generally, the PD and Public Service data stuff is handles in one of a couple of ways. The "Modem" is interfaced either with a dedicated DATA radio, which operates on a seperate channel (Although I am sure there are systems where the data is carried on the voice channel somewhere. It does depend on the load of the data and voice on the channel), OR, they interface to a Cellular Data service, such as CDMA. I Have yet to see a Public Service rely on 802.11. 802.1 is severly limited in range as compared to the coverage provided by a cellular service with lots of real estate coverage, or with a DATA radio that operates in the spectrum that has much greater real estate coverage. Plus, 802.11 is pretty new, and most of the DATA systems have been around since before 802.11, and at a time that they were setting up thier radio systems. It is easier and cheaper to cover a city with ten 800mhz radio sites, then 100 802.11 sites.Quote:
Originally Posted by Zenith_Warrior
The Data system is generally used for several things for PD. Dispatch, they get the job information over the screen. They can indicate thier status, such as on the way to the scene, on scene, available, at meal, blah blahblah. They can also send messages between each other. THey can look up license and registration informaion. Often times, they can fill out and file reports and the like. THEY CAN NOT ACCESS THE INTERNET :D
I don't, however, recognize the radios they are using there. They look a little like GE (Certainly not motorola). Can you tell me what they are using?