York County 911 channel use

[SCPD]

Today at around 14:33, I started hearing comms on the York County 911 channel, at first thought it was YCFLS, then i heard " 57 to central". I know for a fact this was the YCSO. What exactly are the these 911 Channels used for, initially I thought it was admin or backup, but started hearing calls being dispatched.

 

[kc4jgc]

Wirelessly posted (BlackBerry8320/4.5.0.81 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/100)

I have no idea.... Talk group please?

 

[RBMTS]

I could be wrong, but I believe these are the emergency channels set aside for when the emergency button is pushed on radios indicating a distress situation by a fire fighter or public safety officer. Unlike in a traditional smartnet system, a P25 system can move the radio to a private dedicated talkgroup in the event of an activation of the emergency button on the mobile or portable radio. An alert is instantly sent to the dispatcher and that dispatch position (along with a supervisor control station) can be moved to that talkgroup along with the unit in distress. The system assigns the highest priority of traffic allocation to that unit and talkgroup (meaning that if the entire system were at 100% capacity, that emergency receives a frequency allocation that can't be taken away). They would override any lessor priority traffic on the system. This then allows for un-interrupted conversations to hopefully take place with the unit in distress. It also allows for a dispatcher to key the radio if necessary to monitor audio should the person not be able to key the radio themselves.

Many times these "emergency" talkgroups are created for each public safety entity (fire, police, sheriff, etc). What you may have heard was either a conversation due to an accidental trip of the button (happens all the time), or a false/positive by the scanner indicating a wrong talkgroup ID by way of missing a data bit in the data stream - meaning it was a conversation occurring on a different talk group.

I hope this helps.

 

[SCPD]

The TG was 1242, on York County Fire, and that could be correct, but I heard at least 4 different Sheriff's units, and at least 2 different calls being dispatched and one unit, advising he was onscene.

 

[SCPD]

but it's also weird because most of the Sheriff's office and all other Law Enforcement is encrypted, so why would they go to an unencrypted channel.

 

[searingxheretic]

Just a guess, but if this was a one time only event, perhaps the dispatcher patched the talk group by accident.

Sent from my cm_tenderloin

 

[SCPD]

YCSO 911 use 4-26-13

here some recording of the YCSO, unencrypted