Method and apparatus for communicating signals

Details Method and apparatus for communicating signals Method and apparatus for communicating signals

2006-06-13

2006-06-13

Chin, Wellington (Department: 2664)

Multiplex communications

Pathfinding or routing

Combined circuit switching and packet switching

C370S357000, C370S389000

Reexamination Certificate

active

07061905

ABSTRACT:
For use in conjunction with a system for producing, at a transmitter location, time division multiplexed (TDM) frames having a plurality of channels of information signals and framing signals, communicating the frames from the transmitter location to a receiver location, and, at the receiver location, deframing the received frames to obtain frame timing signals and a bitstream of information signals which are coupled with a plurality of operating units. A technique for responding very quickly, upon loss of the TDM signal, to prevent misoperation of the operating units, including: at the transmitter, inserting a preselected pattern of bits in a timeslot of the information signals; at the receiver, detecting, in the deframed bit stream, the absence of the preselected pattern of bits, and producing a control signal in response; and producing override information signals that are coupled to the operating units when the control signal is present.

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