呼叫信令流程.xls

MS BSS MSC VLR HLR PSTN 1 CHANNEL REQUEST RACH IMMEDIATE ASSIGNMENT AGCH (H) SIGNALLING LINK ESTABLISH H 2 REQUEST FOR SERVICE CR (cm service requist, classmark..) CC SUBSCRIBER (cm service requist ack.) SUBSCRIBER DETAILS DETAILS IF NECESSARY 3 AUTHENTICATION SET CIPHER MODE 4 SET UP H call info 5 EQUIPMENT ID REQUEST PLETE CALL CALL PROCEEDING H 7 MAND H circuit channel PLETE H 8 INITIAL AND FINAL ADDRESS (IFAM) PLETE (ACM) ALERTING (MS HEAR RING TONE ) H 9 ANSWER (ANS FROM PSTN) CONNECT (STOP RING TONE) H CONNECT ACKNOWLEDGE 10 CONVERSATION Note: Parameter immediate_assign_mode 0 Set to H_ONLY 1 Set to H_TCH 2 to 255 (reserved for future use) Default value 0 BILLING STARTS