scope:

This Recommendation describes packages for the ITU-T H.248.1 gateway protocol related to data or telematic services. With terminations implementing these packages, a gateway is expected to handle initial modem negotiations, and the communication in voice, fax and text telephone call types. It contains:

- Package "ftmd" for general detection of signals on a fixed telephone line indicating a possible request to enter some data-related mode;

- Package "ctyp" for general call discrimination to sort out if a call should be handled as voice, fax, text telephone or modem data, and perform the initial negotiation;

- Package "txp" for communicating with text telephones in the telephone network;

- Package "fax" for communication with facsimile in the telephone network;

- Package "txc" for general text conversation in other environments;

- Package "ipfax" for fax transmission in IP networks.