ITU-T E.164.2 : E.164 Numbering Resources for Trials Series E: Overall Network Operation, Telephone Service, Service Operation and Human Factors International Operation - Numbering Plan of the International Telephone Service - Study Group 2

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

سال: 2001

زبان: English

قیمت: 55000 تومان