A.SDCCH B.FCCH C.FACCH D.AGCH
A.GSM分組業(yè)務(wù)域數(shù)據(jù)由ABIS接口進(jìn)入GMPS/GEPS框的GEIUB單板,根據(jù)CS1-4MSC1-9編碼方案不同,占用ABIS接口1-4個(gè)16Kbit/s時(shí)隙 B.每個(gè)16Kbit/s子時(shí)隙,在GEIUB解復(fù)用為64Kbit/s時(shí)隙,經(jīng)過GTNU板交換到GEIUT板 C.在GEIUT板復(fù)用為64Kbit/s子時(shí)隙,通過PB接口到達(dá)PCU,在經(jīng)GB接口到達(dá)到達(dá)SGSN
A.GXPUM B.GSCU C.GEIUB D.GEIUT