SIP without Encapsulated ISUP - Detailed Call Scenario
....................................................................................................................................................................................................................................
This section will provide a sample call and describes how the call is
handled when SIP without Encapsulated ISUP is
on and Encapsulated
ISUP is marked
no in RC/V. Terminology defined in the Detailed Call
Scenarios - SIP Base is applicable to this section. The Detailed Call
Scenarios - SIP Base section can be referenced to compare the
differences in call flow.
The following scenario is described in this section:
• Public Switched Telephone Network (PSTN) to Internet Protocol
(IP) call,
• using SCTP transport,
• with preconditions, and
• without Encapsulated ISUP.
A high-level view of the call scenario being described can be found in
Figure 3-17, “High-level Call Flow (without Encapsulated ISUP)”
(3-50). This scenario involves four different 5E-XC
™
switches. The
focus of the description is SIP signaling, specifically without
Encapsulated ISUP.
The call scenario will be divided and discussed in the following
segments:
• Call Setup at OPS
• Call Setup at TPS
• Call Tear Down at OPS
• Call Tear Down at TPS
Figure 3-17 High-level Call Flow (without Encapsulated ISUP)
ISUP
TRUNK
Ethernet
IP Network
OC-3c
IP Network
OC-3c
Terminating
Packet
Switch
(TPS)
Originating
Packet
Switch
(OPS)
5E-XC
TM
5E-XC
TM
Originating
Switch
5E-XC
TM
Terminating
Switch
5E-XC
TM
ISUP
TRUNK
Call Flow
....................................................................................................................................................................................................................................
3-50
Lucent Technologies 235-200-118
Issue 3.02B, March 2007
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