There is a PL on the Tx side but the system is set up with a PL into each tower as well as a "countywide" PL that 911 can hear on any tower. Unsure what issues caused them to set things up like this but PL's are used, similar to the Law side, per tower. It is best, unless someone wanted to program each PL, to leave it as CSQ.
That makes sense. Because low band propagates so well, and they have multiple towers to monitor on the consoles (all individual resources), using a single PL would cause a transmission to "light up" multiple towers. You'd thus wind up with a clear transmission on one or two resources on the console, along with terrible static on the other resources, making it difficult on the dispatcher's ears.
By using distinct P tones per tower site, you largely eliminate this problem, given that a transmission is only going to open squelch on one tower site, vs many or all of them. It also allows the 911 center to readily know which tower to reply back on.
We'll leave the listing CSQ, as this will prevent scanner users from missing transmissions where these differing PL tones are being used across the county.
