The liberalization and deregulation process that started during the last decade in the telecommunication's environment is still running and it is cause of meaningful changes. Increasing competition, favoured also by customer performance requirements, produces big pressures upon service/network providers. The latter, after having faced especially cost reductions for several years, nowadays try to improve quality of service (QoS) in order to differentiate their products from those of their competitors.
ITU-T E.860 SPANISH-2002 Referenced Document
ITU-T E.800-1994 Terms and Definitions Related to Quality of Service and Network Performance Including Dependability - Telephone Network and ISDN Quality of Service, Network Management and Traffic Engineering (Study Group II) 56 pp
ITU-T E.801-1996 Framework for Service Quality Agreement - Series E: Telephone Network and ISDN Quality of Service Network Management and Traffic Engineering - Quality of Telecommunication Services: Concepts Models Objectives and Dependability Planning - Terms and Definit
ITU-T I.350-1993 General Aspects of Quality of Service and Network Performance in Digital Networks Including ISDNs Study Group XVIII