P-25 Affiliations & Pro96Com

[natedawg1604]

It's my understanding that Pro96Com logs "affiliation" messages when a radio affiliates with a particular site and the user selects a TG. Are P-25 affiliation messages generated at particular intervals while a radio stays on a TG?

For example, if someone sitting in a dispatch center turns on a radio and leaves it on a single TG all day, would I only log a single affiliation in Pro96Com when they first turned the radio on, or would the radio generate periodic affiliation messages throughout the day even though the radio stays on a single TG?

 

[mikey60]

Generally you would only see it once, unless of course the radio was near two sites and may be going back and forth between them. It's not unusual for a site to send a query to the radio if it hasn't been seen in awhile either.

Mike

 

[WayneH]

It's my understanding that Pro96Com logs "affiliation" messages when a radio affiliates with a particular site and the user selects a TG. Are P-25 affiliation messages generated at particular intervals while a radio stays on a TG?

For Moto systems, yes (Harris I've no idea). This is a feature Motorola has had around since the 3.x SmartZone days. It allows efficient use of the site so if no one is monitoring a particular TG then it won't get broadcasted at that site. I forget the default but it's typically 12 or 24 hours.

There are various conditions where a radio might affiliate. When turned on, off or changing channels (including to conventional), when the system polls or a sys admin requests it, and when roaming across sites. Site roaming is another topic unto itself due to taking in system configuration, propagation and user/site requirements. In most cases programmers don't bother to, which is why you see radios frequently bouncing between sites.