NexEdge Trunking Question

[btritch]

I have a quick question that I'm hoping someone can answer.
I'm on a NXDN type C trunked system, our group has our own talkgroup. It works great, I just have a small curiosity question, it's a linked system that's linked into two states at a total of 16 different tower sites, same talkgroup, I'm wondering if it works like a P25 statewide system and only utilizes the tower closest to everyone or if it broadcasts all talkgroup traffic from the talkgroup over all 16 sites all the time ?

 

[kd4efm]

Thats a question that only dsd+ can answer. Is you system part of a multi site or not?

Bases on type C, if there are neighbor sites, the yes. If it's a s8ngle site than no.

If your in the Carolinas then the 216 system is a multi site system. Which has a wide area network.

Like my system, in Florida, we have 48 sites state wide.

Question is who are you with? I know most of the southeastern dealers. We have a bridged wide area talk group across 7 states.

 

[btritch]

So it's an IP trunked system I'm pretty sure. I can ask when I go back to the office, I was just curious.
It's our skywarn group. We're in Northeast Arkansas, it covers Northeast Arkansas and Southeast Missouri. It's a commercial company. WQSG768 is our home tower but we can use all 16.

 

[kd4efm]

So it's an IP trunked system I'm pretty sure. I can ask when I go back to the office, I was just curious.
It's our skywarn group. We're in Northeast Arkansas, it covers Northeast Arkansas and Southeast Missouri. It's a commercial company. WQSG768 is our home tower but we can use all 16.

The main question is what COS (Class Of Service) did they give you. I can assign a COS to limit what towers you use, or general COS that allows roaming on all towers. That's a system manager question without a doubt.

 

[btritch]

The main question is what COS (Class Of Service) did they give you. I can assign a COS to limit what towers you use, or general COS that allows roaming on all towers. That's a system manager question without a doubt.

Oh I can answer that one. It's a roaming on all towers setup. I'll confirm that but that's what it's supposed to be.

 

[kb4he]

If your COS includes all towers the following would apply. Most wide area multi-site NexEdge trunking systems are setup to only rebroadcast the talkgroup traffic to sites to which a unit has registered the talkgroup within the last 24 hours. There is no reason to tie up a traffic channel at a remote site broadcasting traffic if there is no unit there to receive it. Also most wide area multi-site NexEdge trunking systems are setup using unicast rather than multicast data transmission. With unicast, the Kenwood system, regardless of the number of sites in the system, can only rebroadcast the traffic through a maximum of 16 sites. Multicast can transmit to all sites either 30 or 48 in a GEN1 system or 1048 in a GEN2 system. But setting up wide area bi directional multicast network is not an easy task so it is rarely implemented.