The Stored Program Control No. 1A processor complex was conceived as a program sequenced control for the Traffic Service Position System No. 1 and for the Electronic Translator Systems. It was designed to be a highly reliable complex using a conservative discrete component hardware design with excellent fault detecting capability and with exceptionally good automatic recovery of call processing when faced with hardware faults.
The design aims, order structure, hardware features, fault detection, diagnostic, and recovery aspects of the system are described. Stress is placed on those features which are felt to be improvements over previous program controlled systems.
Automated Coin Toll Service (acts) has recently been developed for use on Traffic Service Position System No. 1. acts automates the handling of most calls paid for at coin stations, gives time and charge quotations, and provides customer notifications. To accomplish this, a new microprocessor‐controlled subsystem is added to tsps. This subsystem generates announcements and monitors coin deposits. Since acts reduces the operator involvement on coin toll calls, it achieves significant savings for the operating companies. acts was developed together with several other associated features. This entire package was first put into service in November 1977, in Phoenix, Arizona. This paper gives a functional description of the new subsystem and details the customer interface with acts and the other features.
Conventionally, operator assistance is required for most nonsent paid telephone calls (calls that are billed to a number other than the calling number). Examples of these calls include collect, credit card, and bill‐to‐third‐number. These three types of calls currently represent about two‐thirds of all operator‐handled toll calls. To reduce the need for operator assistance, a new service, Calling Card Service, enables customers to make credit card calls by dialing in the billing information without the assistance of an operator; it also provides an alternative to operator‐assisted collect and bill‐to‐third‐number calls. This new capability is made possible through changes in the Traffic Service Position System (tsps) No. 1, and uses the Stored Program Controlled (spc) Network. By providing customers with an alternative to operator assistance, Calling Card Service is helping the Bell Operating Companies (bocs) and independent telephone companies stabilize operator work force requirements. This paper gives a basic description of Calling Card Service and the customer interface. It also describes the implementation in tsps, and other areas of the spc network, and discusses some of the effects on telephone company operations.
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