This Recommendation as approved in 1992 defines a Programming Communication Interface called “APPLI/COM”, providing unified access to Telefax Group 3, Telefax Group 4, telex and teletex services.
Recommendation T.611 has been revised for clarity and to include E-mail services in general, Message Handling Systems (MHS), as described in the ITU-T X.400-series of Recommendations, in particular and File Transfer Services.
Special consideration has been taken to assure backwards compatibility with the 1992 version of this Recommendation.