Portal de Periódicos da CAPES

No. 1 ESS Call Processing

1964; Institute of Electrical and Electronics Engineers; Volume: 43; Issue: 5 Linguagem: Inglês

10.1002/j.1538-7305.1964.tb04131.x

2376-7154

D. H. Carbaugh, G. G. Drew, H. Ghiron, E. S. Hoover,

Software Engineering and Design Patterns

A telephone call goes through six basic stages: (1) detection of a service request, (2) interpretation of the digits dialed, (3) alerting the called customer, (4) establishing a talking connection, (5) call disconnect, and (6) charging. The way in which programs, assisted by circuits and temporary memory, advance a call from one stage to another in no. 1 ESS is described in this article.