Stored Program Controlled Network: Calling Card Service-TSPS hardware, software, and signaling implementation

New hardware and software were developed for the Traffic Service Position System (TSPS) NO. 1 to provide Calling Card Service and related capabilities. These developments allow TSPS to provide prompting announcements to calling card customers, to receive customer-dialed billing information, to verify the received billing information utilizing the data base capabilities of the Stored Program Controlled Network, and to provide operator assistance for calling card customers when required. The implementation includes new TSPS operational and maintenance software, dual-tone multifrequency∗ (DTMF) and multifrequency digit detection and announcement circuits, access to the Stored Program Controlled Network, and new local office interfaces.