Digital Cellular Telecommunications System (Phase 2); Transmission Planning Aspects of the Speech Service in the GSM Public Land Mobile Network (PLMN) System (Fourth Edition; GSM 03.50; Version 4.4.1)
This European Telecommunication Standard (ETS) is concerned with the transmission planning aspects pertaining to the speech service in the pan-European PLMN system. Due to technical and economic factors@ there cannot be full compliance with the general characteristics of international telephone connections and circuits recommended by CCITT. This ETS gives guidance as to the precautions@ measures and minimum requirements needed for successful interworking of the PLMN with the national and international PSTN. The Recommendation identifies a number of routeing and network configurations. The objective is to reach a quality as close as possible to CCITT standards in order to safeguard the performance seen by PSTN customers.