How to limit number of incoming channels on sip trunk?

[digiteltlc (Digitel)]

As per title, (Pj)sip trunk channel number setting purpose is to limit OUTGOING calls.
How to limit INCOMING number of concurrent calls without involve service provider in this ?
Thanks.

[musa116 (Moussa)]

A quick Google search revealed many posts including this one:

Limiting INBOUND concurrent channel count using Dynamic Routes

There are mechanisms for limiting outbound calls based on concurrent channel counts, and there are (clumsy?) ways of including inbound channels in the count for limiting outbound calls, but there is no stock FreePBX feature that allows inbound calls to be blocked based on total inbound channel count. But it can be done with the Dynamic Routes module. See this post for background: Checking Queue Caller Count with Dynamic Routes Suppose you have a tiny office of a few people which very rarely ge…

[Stewart1 (Stewart)]

Whether the service provider is involved or not, you can’t control the number of people trying to call you.

You could, of course, use a dynamic route or custom context to send calls to Terminate Call → Busy if the trunk channel count exceeds some limit.

What problem are you trying to solve? If you don’t have sufficient staff to handle the call volume, IMO it’s better to route to an announcement that offers a callback, takes a message, or at least suggests a better time to call. Some younger callers may have never before heard a busy signal.

If it’s a technical issue (limited bandwidth or server capacity, etc.) it may be better to fix that than to annoy customers.