© 2006 ITT Educational Services Inc. IT412 Voice and Data Integration : Unit 6 Slide 1

Unit 6

VoIP Architecture

(H.323, SIP and MGCP)

© 2006 ITT Educational Services Inc. IT412 Voice and Data Integration: Unit 6 Slide 2

Objectives• Describe and explain MGCP, H.323 and SIP protocols.

List the 3 various architectures used for VoIP. Describe the common H.323 VoIP Services. Describe the common H.323 architecture components. Explain the function of a gateway. Explain the function of a gatekeeper. Describe signaling between gateway and gatekeeper. Explain the gatekeeper directory function and operation. List VoIP Application Servers. Describe SIP network Architecture, its components, gateways and

servers. Describe SIP signaling. Explain how H.323 and SIP networks interconnect. Explain the architecture of a softswitch. Describe a Softswitchs’ signaling, and gateways.

© 2006 ITT Educational Services Inc. IT412 Voice and Data Integration: Unit 6 Slide 3

H.323 VoIP Network Architecture

© 2006 ITT Educational Services Inc. IT412 Voice and Data Integration: Unit 6 Slide 4

VoIP Dial Peers and Call Legs

© 2006 ITT Educational Services Inc. IT412 Voice and Data Integration: Unit 6 Slide 5

Gateway and Gatekeeper Signaling

© 2006 ITT Educational Services Inc. IT412 Voice and Data Integration: Unit 6 Slide 6

Directory Gatekeeper

© 2006 ITT Educational Services Inc. IT412 Voice and Data Integration: Unit 6 Slide 7

SS7 Interconnection to the PSTN

© 2006 ITT Educational Services Inc. IT412 Voice and Data Integration: Unit 6 Slide 8

SIP Wholesale Architecture

© 2006 ITT Educational Services Inc. IT412 Voice and Data Integration: Unit 6 Slide 9

SIP Network Architecture

© 2006 ITT Educational Services Inc. IT412 Voice and Data Integration: Unit 6 Slide 10

SIP Farming

© 2006 ITT Educational Services Inc. IT412 Voice and Data Integration: Unit 6 Slide 11

SIP end-to-end Call Flow

© 2006 ITT Educational Services Inc. IT412 Voice and Data Integration: Unit 6 Slide 12

Adding SIP to an H.323 Core Network

© 2006 ITT Educational Services Inc. IT412 Voice and Data Integration: Unit 6 Slide 13

Local Access Softswitch-Based Architecture

© 2006 ITT Educational Services Inc. IT412 Voice and Data Integration: Unit 6 Slide 14

Call Agent Call Flow

© 2006 ITT Educational Services Inc. IT412 Voice and Data Integration: Unit 6 Slide 15

Softswitch Internetworking