US 4,291,196 AGranted

Circuit for handling conversation data in a distributed processing telex exchange

AssigneeFrederick Electronics Corporation

InventorsJohn W. Spaniol, John J. Bowerman, Marvin Perlman

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Abstract

A circuit for the systematic handling of conversation data from a calling party to a called party for use in a distributed processing telex exchange is disclosed. The customer terminations connected to the exchange are divided into a predetermined number of groups of terminations having a predetermined number of terminations in each group. Associated with each group of terminations is a frame memory which has memory capacity for storing a single bit of conversation data from every termination connected to the exchange. Associated with each frame memory is a vector memory which has a memory location associated with each termination in a group. Each vector memory location contains a frame memory address that addresses the location in frame memory containing the conversation data to be forwarded down to the termination associated with the current vector memory address. In addition, each vector memory location contains an active bit which is included with the conversation data forwarded to the called party termination to indicate that a call is in progress for that termination.

Claims9

Dependent claims

For use in a distributed procesing telex exchange in which the customer terminations connected to the exchange are divided into a predetermined number of groups having a predetermined number of terminations in each group and where each call to or from each termination involves the handling or serialized conversation data bits, a circuit for enabling the systematic handling of the conversation data from a calling party to a called party comprising:

(a) a plurality of frame memories, each memory having an addressable memory location associated with each termination connected to the exchange, for temporarily storing the conversation data generated by every termination connected to the exchange;
and
(b) a plurality of vector memories, one vector memory from said plurality of vector memories associated with a corresponding frame memory from said plurality of said frame memories, each said vector memory having addressable memory locations associated with each of the predetermined number of terminations in a group, for storing in each vector memory location the address within its associated frame memory of the conversation data to be forwarded to the termination within the group that corresponds to the vector memory address.

Dependencies are inferred from the claim text.