多项选择题
A.Gb---SGSN，BSS B.Gc---GGSN，HLR C.Gd---SMS-GMSC，SGSN D.Gf---SGSN，EIR
How many TDMA frames consist of a GPRS multiframe？（）A.2...
单项选择题How many TDMA frames consist of a GPRS multiframe？（）
A.26 B.51 C.52 D.1036
Which logical channel is used to transfer signaling mes...
单项选择题Which logical channel is used to transfer signaling messages such as resource reallocation？（）
A.PDTCH B.PTCCH C.PACCH D.PBCCH
Which logical channel is used to send RACH bust on upli...
单项选择题Which logical channel is used to send RACH bust on uplink and TAs on downlink？（）
