Solved Multiple calls per sip

[HansSA]

Good day, our new 3cx system is working as it should, only thing is it is set for 8 calls, but we are only able to do either one incoming or 1 outgoing. My provider states 1 sip trunk 1 session. I just want to make sure that their statement of 1 sip trunk 1 session is the root cause of this? Will multiple sip trunks help? Thanks any advise will be appreciated

 

[NM Tech]

It would depend on the type of trunk you are being provided. There are SIP providers that provide unlimited minutes but it's a single "session" so to speak. In which case this person would be correct. However you can also get Trunks that provide simultaneous "sessions" but you will likely pay by the minute for these since you could in theory have a huge call center behind one trunk. I think my Flowroute trunk allows a maximum of 24 simultaneous sessions so there is likely a CAP on these simultaneous connections unless you are a huge customer that negotiates something truly unlimited.

You will often see these defined as Channels not sessions.

Just for clarity with my Flowroute trunk I could have 24 simultaneous calls on my single trunk. However I would be paying per minute for each of the 24 calls in progress.

The providers who provide a single channel trunk typically charge a monthly fee in the neighborhood of 25 dollars US and you can talk as much as you like but you can't get calls or make calls if that is your only trunk and it is in use.

Hope that helps.

 

[HansSA]

Thanks, it explains what I need to know. Service provider confirmed it is on their side

 

[NM Tech]

Thanks, it explains what I need to know. Service provider confirmed it is on their side

Perfect. Last suggestions is run the math on call costs. In this day we expect unlimited minutes but we figured out for us it is much much cheaper and way more versatile to just pay by the minute and have the relatively unlimited channels.

Just a thought. Best wishes.