rk that accepts, stores and forwards digitized graphics and messages through the compa- ny's computer/concentrators. The service permits input to be ac- cepted from virtually any type of fax, CRT, Telex, or other keyboard terminal registered for use with the network. The rate structure offers three major classes of service: Class 1 and 2 for delivery of infor- mation to network facsimile devices during the normal business week and hours or after hours and on weekends and holidays; Class 3 for delivery to a Graphnet facsimile office and then by local messenger of pick-up by addressee. Southern Pacific Communications, another common carrier com- pany, introduced their Speedfax service at the beginning of 1978. The service provides a means of transmitting facsimile or other data between authorized facsimile and/or data terminals. The service is offered in 60 cities throughout the United States and is divided into six classes of operation: Class I employs SPC-provided 4-minute an- alog fax machines; Classes II, III, IV and V employ customer-pro- vided analog and digital machines; and Class VI employs SPC- provided sub-minute digital fax terminals. All Speedfax communi- cations are sent to the SPC data forwarding facilities which then performs any code conversions necessary and forwards the material to the respective address. Like FAXPAK, Speedfax provides var- ious price ranges based upon a priority ranking for a message. Three priority choices are offered: Type A, under which transmission is SATELLITE AND CARRIER SERVICES attempted within 15 minutes; Type B, under which transmission is attempted within two hours; and Type C, next day delivery. The user is initially charged with a low subscription fee for each terminal. Transmission rates will vary by class of service and type of priority required. If the user chooses to employ an SPC-provided fax ter- minal, there will also be a monthly usage charge for the equipment. MCI Telecommunications offers an international facsimile service for sending fax messages from the 