ITU-T X.816 SPANISH PDF

Published Date: 10/01/1984

Medición de la diafonía en régimen digital (método utilizado por las Administraciones de Francia, Países Bajos y España)

Published Date: 06/01/1997

Stage 3 Description for Additional Information Transfer Supplementary Services Using Signalling System No.7: User-to-User Signalling (UUS)

Published Date: 05/01/2002

Application of E.164 Numbering Plan for UPT - Series E: Overall Network Operation, Telephone Service, Service Operation and Human Factors - International Operation - Numbering Plan of the International Telephone Service Numbering, Routing and Mobile Services - International Operation - Numbering Plan of the International Telephone Service

Published Date: 11/01/1988

TRANSMISSION OF THE ANSWER SIGNAL

Published Date: 10/01/1997