(under subclass 403) Subject matter including a switching, connection, or control function additional to those necessary to establish and maintain a single call connection between two stations.
(1) Note. These services generally involve three or more stations or two or more call connections.
(2) Note. Examples of such special services are conferencing, call forwarding or transfer, call waiting, etc.
SEE OR SEARCH CLASS
370, Multiplex Communications,
259+, for special services combined with multiplex switching.
379, Telephonic Communications,
157+, for special services on a key telephone system and subclasses 201+ for special services within a landline telephone network.
