Mobile To Mobile (Mobile Originated) : MS BTS BSC MSC
Mobile To Mobile (Mobile Originated) : MS BTS BSC MSC
Mobile To Mobile (Mobile Originated) : MS BTS BSC MSC
BSC
MSC
SDDCH Allocation
Switch to SDDCH
Immediate assign (AGCH) rn+fn+TA+ SDCCH SABM Cm+Service Request Establish Indication
UA
Service Request
Service Request
MS
Setup (SDCCH) Tele/bearer service called party no. Layer 3CC
BTS
Layer 3CC
BSC
Layer 3CC
MSC
Layer 3CC
Physical context confirm Power+TA Channel activation SACCH TA+power updates TCH+TA+cipher+DTX+ power Channel activation ack Assignment command (SDCCH)
Release SDCCH
MS
SABM (FACCH)
BTS
BSC
MSC
Establish indication Set transcoder Set switching path Assignment complete (FACCH)
UA (FACCH)
Layer 3CC
Layer 3CC
Layer 3CC
Layer 3CC
connect
Connect ack
Layer 3CC
MSC
MS
Layer 3CC
BTS
Layer 3CC
BSC
Setup Tele/bearer service
MSC
Layer 3CC
Layer 3CC
User answer
Layer 3CC
Layer 3CC
Connect acknowledge