Quote:
Originally Posted by altec
I was wondering on statewide or areawide trunking systems how you figure out what the proper site numbers would be? I noticed on some systems on the database that some site numbers are confirmed while others are not.
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With Motorola, EDACS and P25 systems a Site ID is transmitted in the control channel data. However, at least in the case of EDACS and Motorola the site IDs are two-digit, whereas the sites are usually three-digit.
Usually you'll see this:
Site XYY
- where X = specific zone / network the site belongs to (provided by one or more people who know the facts)
- where YY = the site number (usually obtained from the control channel data)
Just as an example, go look at the Ohio MARCS statewide system in the Database. You'll see that the statewide system is split up into different networks, and thanks to somebody's input we know what areas of Ohio are covered by those networks as it is indicated at the top of that systems' page.
As far as unconfirmed site numbers, most of the time you see that if somebody has added a new site whose frequencies they obtained from FCC data but nobody has actually had a chance to monitor the control channel to obtain the information. The FCC data lists the area it covers as well as the frequencies and type of license, among other things. Then, somebody sees those unconfirmed entries, plugs the frequencies in their scanner and attempts to see if it is online and perhaps get some information about it. Once the site ID is known, it gets submitted and a db admin updates it.
This also happens a lot with EDACS and LTR sites having unconfirmed LCNs listed. Since in order to monitor an EDACS or LTR site you must know the proper LCN order, it takes somebody actually monitoring the system to confirm the LCN order.
Mike
Areawide Trunking Tower Sites
Linear Mode
