We have an FCM5600 at each site. Can the extensions call each other directly?
We are often asked this, so here is the answer in one place, with the guides that go with it. Ask anything else about it below.
How do I link two offices that each have an FCM5600?
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Yes, with a SIP trunk between the two IP-PBXs. There is a guide for a direct trunk, and one for the same over FRC, with no VPN or static IP between the sites:
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