单项选择题
Which logical channel is used to send RACH bust on uplink and TAs on downlink？（）
A.PDTCH B.PTCCH C.PACCH D.PBCCH
单项选择题 Which parameter is usedby GPRST unnelling protocol between GSNs to identify a PDP context？（）
单项选择题 Which of following interface are not using CCS7 protocol？（）
单项选择题 When a mobile of B class is on the state of standby，what MM information is registered in SGSN？（）
