SIP trunk service, what do you still need to pay for?

Question

Telephony

I want to make a multichannel city number for the organization.
We have our own PBX.
What is the cost of this service?
Do I understand correctly that I only need to purchase a number and 1 communication channel, and I can generate internal (extension numbers) on my PBX in any quantity? And it will be possible at the same time to receive an incoming / outgoing call at least for each extension number?

Answer 1

Yes, everything is so, except:
> And it will be possible to receive an incoming / outgoing call at least for each extension at the same time?
incoming / outgoing call from / to an internal number - as many as you like; from the outside - by the number of allowed simultaneous calls (in the "old" terminology - by the number of lines or channels).

Answer 2

I would recommend buying a number from someone large and reliable type of beeline.
and outgoing trunks can be ordered from any sip provider, there are a lot of them and they offer very cheap outgoing rates, but they are unreliable.
and the range of prices among providers is enormous. Some double the price for the second line, and some do not care how many lines. They give 100, you need more, just write a letter to the TP