ITU-T X.52 FRENCH PDF

Published Date: 03/01/2002

Internal Automatic Observations Series E: Overall Network Operation, Telephone Service, Service Operation and Human Factors Network Management - Checking the Quality of the International Phone Service

Published Date: 03/01/1993

PRINCIPIOS DE LOS SERVICIOS DE TELECOMUNICACIÓN SOPORTADOS POR UNA RED DIGITAL DE SERVICIOS INTEGRADOS Y MEDIOS PARA DESCRIBIRLOS

Published Date: 01/01/2000

Published Date: 05/01/1990

Published Date: 05/01/1999