DIDs versus SIP Trunking for conferencing?

General Help
1

I am looking to setup a simple low cost phone conferencing control system.

I like the features in FreePBX and would like to try and use it.

My question is, Can I use the 4 individual DID numbers I currently use on another platform with unlimited inbound channels with FreePBX to do this?
Or do I need to add SIP Trunking and multiple lines?

I do not need to use any other functions like outbound calling.

Thanks for your support.
Jerry

2

How do you currently get your four DIDs with unlimited channels, if not via SIP Trunking?

3

Hi Martin,

I apologize in how I phrased my question. I have one DID set up on a Freeswitch setup.
I purchased 3 more today to test a couple of other setups with the hopes i could use all 4 with one type of PBX or another independently.

I am asking my question here in the hopes my assumptions of now not being able to was wrong.

Not needing outgoing lines I was trying to figure out the cost of just running a conference system for less than $250.00 a month in SIP Trunk lines for incoming calls only.

My Freeswitch works with one DID and 20 plus calls in multiple rooms now. I was trying to find a PBX or other system that I could just add more DIDs to add the function of more rooms and callers for a reasonable monthly cost.

Thanks,
Jerry