Does the MultiVOIP support T.38 faxing (standard fax protocol over IP)?

Yes, T.38 is supported in the (210, 410, 810, 2400, 2410, 3010) models with firmware version 6.03 or newer. The firmware can be downloaded from our site at:

Go to Configuration, Voice/Fax, put a check mark on Fax Enable, then you may select T.38 under Mode.