qq 20 years

qq 20 years, Total:2 items.

In the international standard classification, qq 20 years involves: .

ITU-T - International Telecommunication Union/ITU Telcommunication Sector, qq 20 years

• SERIES Q SUPP 20-1999 Technical Report TRQ.2310: Bearer Control Signalling Requirements - Leaf-Party Bearer Control Services Q: Switching and Signalling (Study Group 11; 68 pp)

International Telecommunication Union (ITU), qq 20 years

• ITU-T SERIES Q SUPP 20-1999 Technical Report TRQ.2310: Bearer Control Signalling Requirements - Leaf-Party Bearer Control Services Q: Switching and Signalling Study Group 11; 68 pp

Others:   qq 20 years.