Methods of establishing and terminating connections in a distrib

Details Methods of establishing and terminating connections in a distrib Methods of establishing and terminating connections in a distrib

1985-08-02

1987-10-06

Rubinson, Gene Z.

Telephonic communications

Centralized switching system

Switching controlled in response to called station...

370 60, 370 94, H04Q 1104

Patent

active

046988416

ABSTRACT:
This invention provides methods of setting-up and taking-down connections for voice and data calls in a burst switching communications system having distributed-control means coupled with ports of the system. In preferred embodiments, the distributed-control means include port processors serving one or both parties of the call; port processors and call processors serving one or both parties; and port processors, call processors, and administrative processors serving one or both parties. In a burst-switching communications system, control is implemented through control bursts sent through the system between control processors. In a preferred embodiment of setting-up a voice call between X, a calling party, and Y, a called party, the method includes the following steps: detecting X's off-hook condition and applying a dial tone to X's line, performed by X's control processor(s); detecting and storing Y's directory number digit-by-digit as dialed on X's line, performed by X's control processor(s); looking-up Y's port address and Y's control processor's port address based on Y's directory number, and transmitting a control burst to Y's control processor inquiring whether Y's line is busy or idle, performed by X's control processor(s); detecting whether Y' s line is busy or idle, transmitting a control burst to X's control processor indicating same, and if Y's line is idle, causing a ring voltage to be applied to Y's line, performed by Y's control processor(s); if Y's line is busy applying a busy signal on X's line or, if Y's line is idle, applying a ring-back signal on X's line, performed by X's control processor(s); detecting Y's off-hook condition and transmitting a control burst to X's control processor indicating same; performed by Y's control processor(s); and terminating the ring-back on X's line, performed by X's control processor(s); whereby a virtual connection has been established and full-duplex communications may occur.

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