Do I need a VoIP service provider in my case ??

[Guillaume]

Hi, I'll explain quickly the configuration we seek to use. We have one office in Montreal and one office in another city, they are linked by a VPN. The question is : if we put a Sipura box on each end of the Internet transmission, will we be able to communicate or if a special service provider is needed for us anyway ? (we don't need any access to POTS but we want to use our analog phones anyway) I might look like a newbie on that matter...and well I am
thanx for any help provided

[eric]

You can setup your configuration either way.

Personally, I would not use a provider and tie the phone systems together over the VPN.