Multiplex communications – Channel assignment techniques – Details of circuit or interface for connecting user to the...
Patent
1996-04-12
1998-02-10
Chin, Wellington
Multiplex communications
Channel assignment techniques
Details of circuit or interface for connecting user to the...
370466, 370467, H04J 312
Patent
active
057176922
ABSTRACT:
A data communication system (100) has a table driven state machine (300) for communicating call establishment and call termination information with a network switch (200). The table driven state machine (300) has a processor (310) and a memory (320) which stores a set of vectors defining a state transition table for a predetermined signaling type of the switch (200), such as trunk signaling or wink start signaling. The set of vectors defines state transitions and output signals, such as transmit AB signaling bits and a ring flag, based upon input signals of the predetermined signaling type, such as receive AB signaling bits and an off hook flag. The set of vectors is utilized by the processor (310) to receive signaling information from the switch, and to generate signaling information to the switch and other output signals to the data communication system, all corresponding to the predetermined signaling type. The sets of vectors may be varied based upon the selected predetermined signaling type utilized by the switch (200) and may be downloaded into the data communication system (100) or other data communication device.
REFERENCES:
patent: 4539676 (1985-09-01), Lucas
patent: 5333189 (1994-07-01), Clary
patent: 5432792 (1995-07-01), Burkart et al.
patent: 5479402 (1995-12-01), Hata
patent: 5515499 (1996-05-01), Allen et al.
Chin Wellington
Gamburd Nancy R.
Motorola Inc.
Powell John W.
Vu Huy D.
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