Apparatus for insertion of overhead protocol data into a switche

Apparatus for interfacing analog telephones and digital data ter

Apparatus for interfacing between at least one channel and at le

Apparatus for interfacing between telecommunications call signal

Apparatus for isolating a fault on a local area network

Apparatus for loading memories in a telecommunication exchange

Apparatus for locating faults in a carrier subscriber communicat

Apparatus for multi-rate simulcast communications

Apparatus for multiplexing digital signals

Apparatus for multiplexing digital video and a digital sub-signa

Apparatus for obtaining reduced pin count packaging and methods

Apparatus for optical wavelength division multiplexing

Apparatus for processing signalling messages in an asynchronous

Apparatus for programmably accessing and assigning time slots in

Apparatus for providing loopback of signals where the signals be

Apparatus for providing multiple controller interfaces to a stan

Apparatus for providing multiple controller interfaces to a stan

Apparatus for providing telephonic mass announcement service and

Apparatus for reading out address information

Apparatus for rearranging signal channels of a multi-loop time-d