No need to apologize, everyone including myself makes mistakes.
Anyways, lets see if I can type this out without wearing off my fingers.
Before Conrail was split up, there were 4 common road channels that were used for all train operations across the entire system. The numbers are not the AAR numbers, but rather only reference numbers used within the company only.
CH 1 160.800 AAR 46
CH 2 161.070 AAR 64
CH 3 160.860 AAR 50
CH 4 160.980 AAR 58
CH _ 160.935 AAR 55 (added after CSX/NS split)
All road operations used one of these frequencies with the exception of some larger yards and other small exceptions.
Pre CSX/NS Split
-CR Lehigh Line Disp (entire line) CH 2
-CR Trenton Line Disp CH 1
-CR Branch Line Disp CH 3 (this would cover Primarily the secondary tracks like the Chemical Coast, Port Reading Secondary, Amboy Secondary, Southern Secondary, etc...)
After Split
-NS Lehigh Line (PA to Port Reading Junction) CH 2
-CSX Trenton Line CH 4
-CR North Jersey Disp CH 3 (Lehigh Line Port Reading Junction to Valley, National Docks, etc...)
-CR South Jersey Disp CH x (Chemical Coast, Port Reading Secondary)
-CR South Jersey Disp CH 2 (Amboy, Southern, & Freehold Secondaries)
As you can see, the SJ Dispatcher uses two frequencies in the area. The South Jersey frequency of 160.935 (AAR 55) was added after the split up to help alleviate the endless radio chatter that comes from the Chemical Coast, especially in the Port Newark/E Port area. South Jersey also uses 161.070 in the Browns Area for trains operating on the radiating Secondaries and other tracks not controlled by the Browns Yardmaster.
Now heres a very important point to understand. Just because the surrounding main or secondary lines may use a particular frequency, the actual yard itself or tracks controlled by the yardmaster such as certain industrial or running tracks are likely to use a seperate frequency(one of the 4 road channels). This is true with Browns and Port Reading, so I guess technically we both were right! :wink: