Support for G.711 Faxing (T.30)

Support for G.711 Fax (T.30 Fax) is new in CIC 4.0 SU6. Many SIP carriers do not support, or are discontinuing support, for the T.38 fax-over-IP standard (T.30 encapsulation). Receiving fax calls in these scenarios requires T.30 fax support. As of this service update, you can now receive faxes from carriers that do not support T.38.

Through Interaction Administrator, you can set your fax protocol preference to T.30, T.38, or T.38 followed by T.30. If the carrier or gateway does not support T.38, then the latter option automatically falls back to T.30. This fax protocol setting is available in line configuration, default station configuration, and station configuration.

T.30 Configuration