Travis County Fire Frequency

[motorola_otaku]

The VHF freqs aren't "linked" or "patched" to P25 per se... they carry the same voice but paging tones are only sent over VHF so there is a delay between that and P25. It's all managed by the automated dispatch system.

That said, 154.965 is active and carries the same traffic as 1147 on GATRRS; ditto for 154.205 and 1162. Both are robot-only.

 

[rattlerbb01]

The VHF freqs aren't "linked" or "patched" to P25 per se... they carry the same voice but paging tones are only sent over VHF so there is a delay between that and P25. It's all managed by the automated dispatch system.

That said, 154.965 is active and carries the same traffic as 1147 on GATRRS; ditto for 154.205 and 1162. Both are robot-only.

So those two frequencies are non repeated base stations for paging that are only activated by the console for robot dispatching and tones then. Got it.

So we also have 154.175 and 153.950 for the county then, along with all the ESDs old VHF repeaters. Anyone that can chime in on them?

 

[KTR722]

I exclusively monitor GATRRS trunk traffic here in Austin, but can tell you a few items:

- Austin Fire/EMS // 462.975 // ATC EMS Ctrl // EMS Control Simulcast
This frequency is no longer used by ATCEMS, all paging has shifted to AWACS (commercial digital pager) and GATRRS radio alerting. I have personally verified that one. Only Williamson County EMS still uses 462.975 for Locution dispatch. Same probably goes for 462.950

- Austin Fire/EMS // 851.975 // AFD Direct16 // Fire Direct 16
This frequency is active, non trunked/repeated

- Travis County Fire Departments // 154.400 // TC CF Tac 4 // Travis County Fire Control
This frequency is no longer in use, department merged with City of Austin. Am 99.44% sure the rest of the Travis County Fire Departments are no longer in use, having been replaced by the GATRRS ESD talkgroups. Tac 1, 8, 9, 12 are expired per FCC. I see ESD11 is marked as Deprecated; assuming that denotes a licensed but unused frequency, that probably describes these frequencies best. Unless the apparatus is over 15-20 years old, i doubt any VHF mobile radios are still installed and no Fire/EMS personnel carry VHF handhelds. Their only use would be possibly for volunteer paging or as a tertiary radio backup plan (the current GATRRS backup radio plan is 800MHz non-trunked).

I am in NW Austin close to Lake Travis, if need be, I can dig up an old scanner and throw a few of these on if needed to see if I hear anything on them.

 

[rattlerbb01]

I am in NW Austin close to Lake Travis, if need be, I can dig up an old scanner and throw a few of these on if needed to see if I hear anything on them.

That is good info. Thank you. Looking through the page, it looks like conventional monitoring hasn't been much of a thing for a while. Lots of ISD frequencies as well that are still marked as FM. I'll have to plan a visit to my brother one day over there (lives off of Research Pkwy) and just lock out GATRRS and see what all conventional stuff comes up still.

 

[motorola_otaku]

So those two frequencies are non repeated base stations for paging that are only activated by the console for robot dispatching and tones then. Got it.

If you really want to get into the nitty-gritty the AFD freq is just for backup station alerting while the County freq is used for both paging and station alerting.

 

[Project25_MASTR]

If you really want to get into the nitty-gritty the AFD freq is just for backup station alerting while the County freq is used for both paging and station alerting.

For the most part, most of the ESD's simply use VHF for station alert systems. One popular setup in the area is a VHF radio (Motorola CDM1250 typically) is used as a two-tone decoder to flip the station's PA over to the line out on an XTL or APX radio to receive the audio of the page (even though it is also sent over VHF).

 

[motorola_otaku]

For the most part, most of the ESD's simply use VHF for station alert systems. One popular setup in the area is a VHF radio (Motorola CDM1250 typically) is used as a two-tone decoder to flip the station's PA over to the line out on an XTL or APX radio to receive the audio of the page (even though it is also sent over VHF).

Pssh, welfare. Flash the APXes for GA09000 and use the VIP outs to drive PLC logic.

 

[Project25_MASTR]

Pssh, welfare. Flash the APXes for GA09000 and use the VIP outs to drive PLC logic.

“But it works as it’s setup”.


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[Mark]

Looks like a new chopper headed your way from AgustaWestland in Philly logged here yesterday morning.
(A33EB6) N308TC Leonardo AW169 at 135knots 1340z for Travis County STAR flight showing callsign P22.
N308TC Live Flight Tracking and History (A169 owned by AGUSTAWESTLAND PHILADELPHIA CORP) ✈ FlightAware

From Wiki.. In October 2017, Travis County awarded a contract to AgustaWestland Philadelphia Corporation to replace the existing fleet with three AW169s. Unlike the current EC145s, the AW169s will be outfitted with fixed belly tanks for firefighting.[20] The UH-1H will also be retired.
I see AW-169 N307TC arrived there May 19,guess next in line will be N309TC. That 3 fine choppers