Overview of T.38 Fax

T.38 is a protocol for sending faxes over an IP network or the internet.

The T.38 fax protocol was developed as a way to permit faxes to be transported across IP networks between analog fax machines. Traditional VoIP systems were developed for voice rather than fax calls, conventional fax machines worked poorly or not at all. Thus, some way of transmitting fax over IP was needed.

T.38 fax is now recognized as the preferred method for sending faxes over the 3G mobile or cellular networks. The traditional way of sending a fax over 2G is using CSD (Circuit Switch Data). Service providers are starting to phase out CSD and the new T.38 method will rapidly take over.

The Ericsson W35 enables you to connect a standard fax machine and send faxes using the T.38 protocol over the W35's internet connection.

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