1. Um接口上手機(jī)主叫信令流程
ChannelRequest信道請求(請求分配SDCCH信道，通過RACH信道傳送)
ImmediateAssigment 立即指配(分配SDCCH信道，通過AGCH信道傳送)
CMserviceRequest CM業(yè)務(wù)請求SD（業(yè)務(wù)請求）
AuthenticationRequest 鑒權(quán)請求
AuthenticationResponse鑒權(quán)響應(yīng)
CipheringmodeCommand 加密模式命令
CipheringmodeComplete加密模式完成
Tmsi reallocationCommandTMSI再分配命令
Tmsi reallocationComplete TMSI再分配完成
CMserviceAcceptCM業(yè)務(wù)接受
Setup建立(上報被叫號碼，通過SDCCH信道傳送)
Callproceeding 呼叫進(jìn)程（呼叫開始指令）
AssignmentCommand 指配命令SD（信道指配指令）給MS分配TCH
AssignmentComplete指配完成FACCH（信道指配完成）TCH
Alerting提醒(被叫振鈴，通過SACCH信道傳送)
Connect 連接(接通，通過FACCH信道傳送)
Connect ack連接證實(確認(rèn))FACCH
Disconnect 斷開連接(主叫掛機(jī)，通過FACCH信道傳送)
Release 釋放請求(信道釋放，通過SACCH信道傳送)
Release complete 釋放完成
Channelrelease 信道釋放

2. Um接口上手機(jī)被叫信令流程
Paging request PCH
ChannelRequestRACH
ImmediateAssigment AGCH
PagingReponse
AuthenticationRequest
AuthenticationReponse
CipheringmodeCommand
CipheringmodeComplete
Tmsi reallocationCommand
Tmsi reallocationComplete
s
Setup
Call Comfirmed
AssignmentCommand
AssignmentComplete
Alerting
Connect
Connect ack
Disconnect
Release
Releasecomplete
Channelrelease