Help understanding how to program a CAP+ system

[kayn1n32008]

Thank you for the info! So the channel pool for a cap single site would only contain 2 freqs?

It's entirely dependant on how many RF channels the Cap+ single site system has. CAP+ single site can have as little as 1 RF channel(2 time slots) to as many as 8 RF channels(16 time slots).

One system local to me has 4 RF channels and it's a single site system.

 

[dickie757]

It's entirely dependant on how many RF channels the Cap+ single site system has. CAP+ single site can have as little as 1 RF channel(2 time slots) to as many as 8 RF channels(16 time slots).

One system local to me has 4 RF channels and it's a single site system.

What I fail to grasp is the usage case. If the site only provides one freq pair on two slots, that is no different than a conventional MotoTRBO repeater. And then, if the site has more than one pair, are they just channels that are available to the user, but not controlled like a trunked system?

Another question...if the site has two or more pairs, will the TG traffic get routed to the other pair(s)?

 

[kayn1n32008]

What I fail to grasp is the usage case. If the site only provides one freq pair on two slots, that is no different than a conventional MotoTRBO repeater. And then, if the site has more than one pair, are they just channels that are available to the user, but not controlled like a trunked system?

Another question...if the site has two or more pairs, will the TG traffic get routed to the other pair(s)?

It's different in that the repeater will dynamically assign a time slot. With conventional a talkgroup is static slaved to a time slot.

If a site has more than one pair, the system assigns time slots based on demand. It's not controlled like CAP Max or P25 with a continous control channel, but the Info is sent over the rest channel.

Absolutely. The system will assign a talkroup to what ever next timeslot is available. The busier the system, the more time slots that will be used.

 

[lwvmobile]

Another question...if the site has two or more pairs, will the TG traffic get routed to the other pair(s)?

Cap+ pumps out a CSBK on its rest channel, and during traffic on any RF channel that updates talk group activity, it also puts the current rest channel in both the Slow Link Control every 4 timeslots, and in the link control during call activity so radios can figure out where to go, either to the call if they are apart of it, or to go to the rest channel slot if they aren't busy.

A good thread covering how Cap+ works on a decoding level can be found here:

Understanding Capacity Plus trunking, some more

I read in whitepapers for Capacity Plus (CAP+), that private calls can be used. I can't remember ever seeing a private call occurring but I'm interested if anyone has ever seen these types of calls. How are private calls announced in a Capacity Plus system? As we know with CAP+, all calls...

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