2-18 Cookie Mechanism 2-36
.....................................................................................................................................................................................................................................
3 Call Flow
3-1 Packet Trunking 3-3
3-2 PSTN Gateway 3-4
3-3 Network Elements 3-6
3-4 Network Connections 3-8
3-5 Successful Call Completion Message Flow 3-15
3-6 5ESS
®
Switch OPS - 5ESS
®
Switch TPS Message Flow 3-17
3-7 5ESS
®
Switch PSTN Gateway TPS and TAS OPS Message
Flow 3-21
3-8 SIP INVITE 3-40
3-9 SIP 183 SESSION PROGRESS 3-43
3-10 SIP UPDATE 3-44
3-11 SIP 200 OK (UPDATE) 3-45
3-12 SIP 180 RINGING 3-46
3-13 SIP 200 OK (INVITE) 3-47
3-14 SIP BYE 3-47
3-15 SIP 200 OK (BYE) 3-48
3-16 SIP without Encapsulated ISUP Successful Call 3-49
3-17 High-level Call Flow (without Encapsulated ISUP) 3-50
3-18 Call Setup at OPS - Steps 1-9 3-51
3-19 Call Setup at OPS - Steps 10-17 3-53
3-20 Call Setup at OPS - Steps 18-21 3-54
3-21 Call Setup at OPS - Steps 22-25 3-55
3-22 Call Setup at TPS - Steps 1-6 3-56
....................................................................................................................................................................................................................................
FIGURES
xii
Lucent Technologies 235-200-118
Issue 3.02B, March 2007
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