单项选择题
How many families of MCS are defined for EGPRS?（）
A.1 B.2 C.3
单项选择题 The SCTP layer in the C7 signalling protocol stack is responsible for which of the following:（）
单项选择题 What is the name of the protocol that is used between the MSC Server and the M-MGw?（）
单项选择题 What would be the effect of reducing the parameter PILTIMER?（）
