Stored Program Controlled Network: 800 Service Using SPC Network Capability - Network Implementation and Administrative Functions

The 800 Service, which allows a customer to receive calls without charge to the calling party, has specific network and administrative methods of operation. In the previous paper on the 800 Service by Sheinbein and Weber, appearing in this issue of The Bell System Technical Journal, the change in the method of operation to use the Stored Program Controlled (SPC) Network and the use of centralized data bases called Network Control Points (NCPS) were discussed. With this new method of operation, the previous network and administrative methods were reviewed, adjusted, or totally changed. The network implementation involved changes in the type and characteristics of the Originating Screening Offices (osos), Signal Transfer Points (STPS), NCPS, trunking, routing, and overall coordination. The administrative changes primarily affected service provisioning, but they also had a significant impact on service maintenance, network maintenance, net1745 work administration, and network management. Sections II and III of this paper describe these changes.