ITU-T Q.725 : Signalling System No. 7 - Signalling Performance in the Telephone Application - Specifications of Signalling System No. 7 (Study Group XI) 11 pp

سازمان: ITU-T - International Telecommunication Union/ITU Telcommunication Sector

سال: 1993

زبان: English

قیمت: 55000 تومان