Like the processors for the earlier electronic switching systems (e.g., No. 1 ESS, No.
1.1 Memory hierarchy The 1A Processor memories are call stores (CSs), program stores (PSs), file stores (FSs), and tape. The program and call stores are very similar in hardware.
A steady and rapid increase has occurred in urban and toll traffic and service features during the past decade.
1A technology is a standard set of devices, apparatus, and design tools which are used not only to design the 1A Processor and No. 4 ESS system, but also new switching systems such as No.
Planning for system integration and testing started at the beginning of the 1A Processor 1 development. Much of this planning was based on experience gained in the development of No.
1.1 Background Custom Calling Services now available to electronic switching system (ESS) customers have been implemented through software features and the existing switching periphery associated w
The introduction of No. 1 ESS in 1965 signaled the beginning of new telephone services to the residence and business customer.
The 1A Voice Storage System (1A vss) comprises a new functional node in the telephone network, which will provide a number of new services classified generally as Custom Calling Services II (ccs II
1.1 Motivation In modern times, distant voice communication in the United States has been predominantly by telephone.
Software By G. W. GATES, R. F. KRANZMANN, and L. D.
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