we have a handful of SBX IP phone system s installed, for the most part, we never hear from them, so, today a customer ask's about getting an IP Phone...I have some instructions on setting it up In the phone system, But, My question is: do I need any Special IP cards in the system? it's currently configured with the main board and another 3X8 board.

Yes, you'll need a VoIB.

so, does the VoIB board fit in the main cabinet? OR, are you saying I would need an Expansion cabinet and a VoIB board?

It fits in the main cabinet.

Whew. Thanks !

There is an SBX tech guide on V-connect that provides the set up for an ip phone.

Try and go straight from carrier to card. Use a public IP address. A lot easier that way.

Absolutely! Ip phones work much easier behind a router and NAT, but the phone system hang it on a public ip.