I think by Radio IDs, he is meaning the individual radio subscriber IDs that you can see with the GRE-500 scanner.
Lucas County Radio IDs:
On the Lucas County P25 system for example, a Radio ID of . . .
025001 = Toledo Police Portable
Or broken out like the following . . .
XYYZZZ
X (Radio Type):
0 = Portable
1 = Mobile
2 = Base
9 = Console (*see below)
YY (Radio Agency):
An alphabetical list of agencies from 01 (Air Natl Guard) to 32 (Whitehouse) . . .
YY Agency Name
1 Air Natl Guard
2 Berkey
3 Court Security
5 Demo
7 EMS
8 Holland
9 Jerusalem Twp
10 Maumee
11 Metroparks
12 Monclova Twp
13 Oregon
14 Ottawa Hills
15 Port Authority
16 Providence Twp
17 Richfield Twp
18 Sheriff
20 Spencer Twp
21 Springfield Twp
22 Swanton
23 Sylvania City
24 Sylvania Twp
25 Toledo
26 Toledo (Block2)
27 Toledo (Block3)
28 University
29 Washington Twp
30 Waterville
31 Waterville Twp
32 Whitehouse
>32 Special, Mutual Aid, Etc
ZZZ (Specific Radio):
000-499 = Law
500+ = Fire
* Consoles follow a slightly different structure (and each console has an individual Radio ID for each individual talk group). Where Radio ID of 9YYZZZ, YY below is the specific console position, and ZZZ is unique for each individual talkgroup:
YY Console Position
02 Lucas Sheriff Supervisor
03 Lucas Sheriff Dispatcher 1
04 Lucas Sheriff Dispatcher 2
05 Lucas Sheriff Dispatcher 3
07 County EMS Dispatcher 1
08 County EMS Dispatcher 2
09 County EMS Dispatcher 3
10 County EMS Dispatcher 4
20 Toledo Fire Dispatcher 1
21 Toledo Fire Dispatcher 2
22 Toledo Fire Dispatcher 3
23 Toledo Fire Dispatcher 4
24 Toledo Police Dispatcher 1
25 Toledo Police Dispatcher 2
26 Toledo Police Dispatcher 3
27 Toledo Police Dispatcher 4
28 Toledo Police Dispatcher 5
39 County Fire Patch Console
40 Maumee PSAP Dispatcher 1
41 Maumee PSAP Dispatcher 2
42 Maumee PSAP Dispatcher 3
43 Ottawa Hills PSAP Dispatcher 1
44 Ottawa Hills PSAP Dispatcher 2
45 Oregon PSAP Dispatcher 1
46 Oregon PSAP Dispatcher 2
47 Oregon PSAP Dispatcher 3
48 Sylvania City PSAP Dispatcher 1
49 Sylvania City PSAP Dispatcher 2
50 Sylvania Twp PSAP Dispatcher 1
51 Sylvania Twp PSAP Dispatcher 2
52 Sylvania Twp PSAP Dispatcher 3
54 Sheriff Fire Patch Console
Also when watching radio system activity with a P25 monitoring program like Pro96Com software that is hooked up to a GRE or Radio Shack scanner, one can easily see all of the system Talk Group and individual Radio ID activity as well.
Now with the GRE-500 capabilites, these IDs are now really easy to see during normal talkgroup activity without any other software. Folks may also hear references to these Radio IDs over the air as well, such as when units are hitting on, etc.
This system has been set up really well when it comes to the Radio IDs, with everything following the above defined rules and so forth.
Ohio MARCS Radio IDs:
As for the Ohio MARCS system, Radio IDs essentially use the following structure, but after that there is not much consistency:
XYYYY (Where X = Zone and YYYY is four numbers.)
X (OmniLink Zones):
1 = Central Ohio
2 = Northern Ohio
3 = Southwest Ohio
4 = Southeast Ohio
5 = Consoles
6 = Consoles / Radio Service
There are also alot of exceptions to the rule.
Jeff