A.信令子路由 B.信令點(diǎn) C.信令轉(zhuǎn)接點(diǎn) D.信令鏈路集
A.0.3,0.5 B.0.3,0.4 C.0.4,0.2 D.0.5,0.2
A.信令數(shù)據(jù)鏈路功能 B.信令鏈路功能 C.信令網(wǎng)功能 D.用戶部分