Southampton PD Frequency Useage

[W1KNE]

This question was asked about six years ago here but the answer remains cloudy at best, so I am reasking it.

Southampton has the following, according to our database
155.41500 WPUR512 RM 131.8 PL Sthmptn PD 1 Police channel 1 FM Law Dispatch
155.97000 WNQR202 M Sthmptn PD 2 Police channel 2 FM Law Tac
154.84500 WYW926 RM 156.7 PL Sthmptn PD 3 Police channel 3 FM Law Dispatch
154.81500 WNQR202 RM 141.3 PL Southmptn PD Police FM Law Talk

During tropo openings here in RI, 155.415 / 131.8 and 154.815 / 141.3 both come in fairly regularly here.

My question is, what is 154.815 / 141.3 used for??

 

[GTR8000]

I'm not sure of the answer, but as I look at that listing one thing I do notice is that 155.970 "Police channel 2" is the input for 154.815 "Police" and should not be listed separately. I will fix it.

 

[Spec]

I'm not sure of the answer, but as I look at that listing one thing I do notice is that 155.970 "Police channel 2" is the input for 154.815 "Police" and should not be listed separately. I will fix it.

Ref Police 2 :Could this possible a simplex TAC channel. This type of use is not uncommon. It allows the cars to not light up the repeater but still hear the dispatch if they call.

 

[GTR8000]

Ref Police 2 :Could this possible a simplex TAC channel. This type of use is not uncommon. It allows the cars to not light up the repeater but still hear the dispatch if they call.

On the input? On the output, sure, but it's pretty uncommon to use the input as a simplex channel. For one thing, if dispatch is controlling the repeater directly via wireline/microwave (not as a control station), you wouldn't hear them even if you were monitoring the input. You may not hear them even if they're using a control station to hit the repeater, if the transmitter is low power or far enough away. And of course, if you're transmitting on the input with a different tone than the repeater requires, you risk preventing someone nearby from opening the repeater if they have an emergency, especially if they're on portable and you're on a mobile.

For what it's worth, the database has numerous examples of repeater inputs being incorrectly listed separate, usually with the exact same tone as the output. In looking through the submission histories, I've found that in almost all cases, this was simply a listener not realizing they were hearing the repeater input. They believed they had found a "new" frequency.

 

[SCPD]

If they want a little bit of privacy agencies sometimes use the repeater input as a talk-around channel because almost no one ever monitors it. Especially a PD using the input to a DPW repeater after hours or a public works repeater pair could be used to provide two fireground channels at night or on weekends.

 

[W1KNE]

But what about my original question?