SYS ALL message

[NMPhillieFan]

I've noticed a few times that an odd transmission comes across the radio and the radio just shows "SYS ALL". Tonight, I had my radio on "ALARM" which is the fire department dispatch channel. The transmission sounded like City Animal Control. I noticed in unitrunker that the Animal Control talkgroup was active at the time.

Does anyone know, in general, what the "SYS ALL" message means and why it would appear on a totally unrelated talkgroup from where the transmission originated? Also, how does the transmission occur, ie emergency key?

FYI, I did not hear the transmission on the police talkgroups....this is an EDACS radio system.

 

[morganAL]

Usually, that means someone has placed a system wide "all call". When that happens, all calls in progress are dropped and all radios on the system go to the channel assigned to the all call by the control channel.

 

[NMPhillieFan]

Usually, that means someone has placed a system wide "all call".

While that makes sense, how does one place a system wide "all call"? As I mentioned in my example, this was an Animal Control officer transmitting and it did not appear to even be an emergency button activation...thanks for the info, so far.

 

[wa8pyr]

While that makes sense, how does one place a system wide "all call"? As I mentioned in my example, this was an Animal Control officer transmitting and it did not appear to even be an emergency button activation...thanks for the info, so far.

Systemwide Call is normally a feature only available to certain select radios and has to be programmed into the radio; it's not usually something the average joe is supposed to have access to....

The same applies for Motorola systems with the feature enabled.

If an Animal Control officer has access to it, I'd say somebody goofed when programming the radio.

 

[NMPhillieFan]

If an Animal Control officer has access to it, I'd say somebody goofed when programming the radio.

That's possible. I just recently noticed a field officer has the same radio LID as the Albuquerque PD helicopter...not a good scenario in an emergency....

The example I gave is just one example of this SYS ALL activation. I have noticed it before, recently...never were the transmissions legitimate "all calls", just general traffic coming across an unusual talkgroup. If not for that, I probably would not have even noticed it at all.

Thanks again.

 

[EnidPuceflange]

The All Call feature really has only one use - to notify all the users on a particular site that there will be an interruption of service. Anyone transmitting at the time won't know about the call, and anyone receiving gets pulled into the call.

It's a programmed option under the I-call list..what you heard sounds like it was a malformed control channel assignment - perhaps your receiver is in a high bit-error rate spot?