UNE-EG 202057-2 V1.3.1:2009 Speech Processing, Transmission and Quality Aspects (STQ);User related QoS parameter definitions and measurements;Part 2: Voice telephony, Group 3 fax, modem data services and SMS
2009UNE-EG 202057-2 V1.3.1:2009 Speech Processing, Transmission and Quality Aspects (STQ);User related QoS parameter definitions and measurements;Part 2: Voice telephony, Group 3 fax, modem data services and SMS