Stromberg-carlson Corporation

John W Woodward

Pedro A Lenk

Barrie Brightman

William H Stewart

Jayantkumar R Shah

Thomas E Ellis

James E Jones

Haresh C Jotwani

Nickoline P Mealo

Russell E Steinke

Rick L Mantz

A common control for a community office (C.O.) switching system includes two interactive processors. One of these interactive processors is a call control processor which comprises the uppermost element in the control hierarchy. It is a stored program processor and its functions include: (i) control of call progression, (ii) marking paths through the matrix switch network, and translations. The other of these interactive processors is a port event processor. It is a construction of electronic logic circuitry known as 'combinatorial logic'. The port event processor operates on the principle of the combinatorial logic being sequentially coupled to every one of the port equipment positions over a 4 millisecond scan cycle. A pair of functional units of the port event processor provide the common control capability to sense or transmit supervisory events. These function units also interact with the call control processor in a way which permits the latter to function as the uppermost hierarchical element of the common control with substantially no burden of performing real-time tasks connected with port events. The interaction between the call control processor and the port event processor is effected through a port data store which provides an individual port data field per port equipment position. In general, each port data field is accessible to either of the interactive processors.

Arrangement of interactive processors for control of ports

A telephone switching system for telephone lines in a telephone network that carry voice and associated supervisory information signals. The voice signals are received through one of a plurality of ports under the control of a port event processor and are transferred through a switching arrangement, under the control of a call processor, and transmitted through a port again under the control of the port event processor. The received supervisory information is stored in a port data store memory, which also stores call state and command information. The port event processor retrieves the stored supervisory information and commands from the port data store memory, and processes the supervisory information in response to the commands in at least two functional units, and returns processed information for storage in the port data store memory.

Arrangement of interactive telephone switching processors providing

A telephony switching system for interconnecting a plurality of telephone lines. A port storage circuit dedicates an area to each telephone line for storing status information including supervisory information and dial digit information for the corresponding telephone. A port event processor monitors incoming supervisory information from each port means connected to each telephone line to update the corresponding information in each area of the port storage circuit. Upon the occurrence of predetermined events, such as the receipt of all the digits in a telephone number, the port event processor produces an event code that is also stored in the port storage area. A call processor scans all the port storage areas to establish, for each port means, a progression of call states in response to the event information and other information in the port storage circuit and to update control information in the corresponding area. The port event processor transmits control supervisory information to each port means in response to information in the corresponding port storage area. During digit dialing operations, each port store area accumulates all the digits for the corresponding telephone and corresponding locations whereby the port storage means can accumulate digits from all the telephone lines.

Arrangement of interactive telephone switching processors and associated

A common control for a community office (C.O.) switching system includes two interactive processors. A call control processor comprises the uppermost element in the control hierarchy and is a stored program processor that controls call progression, marks paths through a matrix switch network, and performs other functions. A port event processor constructed of 'combinatorial logic' is sequentially coupled to every port equipment position connected thereto over a four millisecond scan cycle. Interaction between the call control processor and the port event processor is effected through a port data store, which provides an individual port data file per port equipment position. The port event processor also includes timers that respond to call timing information that can be stored in a port data field for controlling the processing of certain signals from the corresponding port equipment position.

Arrangement of interactive telephone switching processors for performing

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Longwood, FL, United States of America

John W Woodward