VoIP

T.38

The T.38 IP-based fax service maps the T.30 fax protocol onto an IP network. Both fax and voiced data are managed through a single gateway. T.38 uses 2 protocols, one for UDP packets and one for TCP packets. Data is encoded using ASN.1 to ensure a standard technique. It allows users to transfer facsimile documents between 2 standard fax terminals over the Internet or other network using IP protocols. H.323 can be used here in the same way that it is used to support Voice over IP.