1、In mobile telephony, 2.5G protocols extend 2G systems to provide additional features such as packet-switched connection (GPRS) and enhanced data rates (HSCSD, EDGE).
2、在移動德律風技巧中,2.5G和談將2G系統擴展到供給諸如分組互換連接(GPRS) 的附加效用和更高的數據傳輸速度(HSCSD、EDGE)。