SIP-T: Context and Architectures

1
SIP-T Context and Architectures

• Aparna Vemuri
• Jon Peterson
• Level (3) Communications

2
Introduction

• Context and architectures for SIP-T
  (draft-vemuri-sip-t-context-00.txt)
• Roles and responsibilities of network entities
• Issues for consideration

3
Purpose

• Feature transparency
• Encapsulation
• Translation

4
PSTN-IP Interconnections

• PSTN origination - PSTN termination (SIP
  bridging)
• ingress MGC
• perform encapsulation
• perform translation
• egress MGC
• interpret body
• generate ISUP

5
PSTN-IP Interconnections

• PSTN origination - IP termination
• MGC
• perform encapsulation
• perform translation
• IP end-point
• ignore ISUP

6
PSTN-IP Interconnections

• IP origination - PSTN termination
• IP end-point
• originate SIP
• MGC
• generate ISUP

7
Issues

• SIP MIME type negotiation
• ISUP repetition problem