en_300903v080101p(官方网站下载）ETSI EN 300 903 V8.1.1 (2000-11) European Standard (Telecommunications series) Digital cellular telecommunications system (Phase 2+); Transmission planning aspects of the speech service in the GSM Public Land Mobile Network (PLMN) system (GSM 03.50 version 8.1.1 Release 1999) R GLOBAL SYSTEM FOR MOBILE COMMUNICATIONS (GSM 03.50 version 8.1.1 Release 1999) 2 ETSI EN 300 903 V8.1.1 (2000-11) Reference REN/SMG-110350Q8R1 Keywords Digital cellular telecommunications system, Global System for Mobile communications (GSM) ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N° 348 623 562 00017 - NAF 742 C Association à but non lucratif enregistrée à la Sous-Préfecture de Grasse (06) N° 7803/88 Important notice Individ……