I work in a rather large organization that has several thousand phones. We currently have approximately 10 PRI's from one provider that we use for inbound outbound dialing.
We are discussing possibly trying to move to use SIP service provider. However I have a couple of questions that I can't seem to find an answer for.
1. How do I find a SIP service Provider?
2. Would the SIP service provider usually bring in a dedicated line to the organization such as a DS3 and connect this to there network?
3. How do I calculate the amount of bandwith that I need.
Thanks for any help