ITU-T E.774-1996
航海和航空移动业务的网络服务等级(GOS)参数和目标值 E系列:电话网络和综合业务服务网(ISDN)
Network Grade of Service Parameters and Target Values for Maritime and Aeronautical Mobile Services - Series E: Telephone Network and ISDN Quality of Service Network Management and Traffic Engineering - Traffic Engineering - Mobile Network Traffic Enginee