teletypewriter exchange service
For purposes of this subchapter, the term “teletypewriter exchange service” means the access from a teletypewriter or other data station to the teletypewriter exchange system of which such station is a part, and the privilege of intercommunication by such station with substantially all persons having teletypewriter or other data stations constituting a part of the same teletypewriter exchange system, to which the subscriber is entitled upon payment of a charge or charges (whether such charge or charges are determined as a flat periodic amount, on the basis of distance and elapsed transmission time, or in some other manner). The term “teletypewriter exchange service” does not include any service which is “local telephone service” as defined in subsection (a).