gatewayhome BS MS MSC VLR HLR MSC gatewayhome

gateway/home BS MS MSC VLR HLR MSC

gateway/home BS MS MSC VLR HLR MSC IAM(ISUP)

gateway/home BS MS MSC VLR HLR MSC IAM(ISUP) Send Routing Info

gateway/home BS MS MSC VLR HLR MSC IAM(ISUP) Send Routing Info Provide Roaming #

gateway/home BS MS MSC VLR HLR MSC IAM(ISUP) Send Routing Info Provide Roaming # ACK(MSRN)

gateway/home BS MS MSC VLR HLR MSC IAM(ISUP) Send Routing Info Provide Roaming # ACK(MSRN)

gateway/home BS MS MSC VLR HLR MSC IAM(ISUP) Send Routing Info Provide Roaming # ACK(MSRN) SS 7 Call Setup IAM

gateway/home BS MS MSC VLR HLR MSC IAM(ISUP) Send Routing Info Provide Roaming # ACK(MSRN) SS 7 Call Setup IAM Paging Request

gateway/home BS MS MSC VLR HLR MSC IAM(ISUP) Send Routing Info Provide Roaming # ACK(MSRN) SS 7 Call Setup IAM Page Paging Request

gateway/home BS MS MSC VLR HLR MSC IAM(ISUP) Send Routing Info Provide Roaming # ACK(MSRN) SS 7 Call Setup IAM Page rsp Paging Request

gateway/home BS MSC MS VLR HLR MSC IAM(ISUP) Send Routing Info Provide Roaming # ACK(MSRN) SS 7 Call Setup IAM Page rsp Paging Request Page rsp

gateway/home BS MSC MS VLR HLR MSC IAM(ISUP) Send Routing Info Provide Roaming # ACK(MSRN) SS 7 Call Setup IAM Page rsp Paging Request Page rsp ASSIGNMENT

gateway/home BS MSC MS VLR HLR MSC IAM(ISUP) Send Routing Info Provide Roaming # ACK(MSRN) SS 7 Call Setup IAM Page rsp Paging Request Page rsp ASSIGNMENT Channel Assignment