Implementing a Voice Over Internet (Voip) Telephony using SIP. Final Project report Presented by: Md. Manzoor Murshed

Transcription

1 Implementing a Voice Over Internet (Voip) Telephony using SIP Final Project report Presented by: Md. Manzoor Murshed

2 Objectives Voice Over IP SIP H.323 MGCP Simulation using Westplan Conclusion 5/4/2006 CprE: 550 2

3 Voice over IP provide the functionality required to set up, manage, and tear down calls and connections; be scalable to support a very large number of registered endpoints (in the order of billions worldwide), and a very large number of simultaneous calls (in the order of millions worldwide); support network management features for policy control, accounting, billing, etc; provide a mechanism to communicate and set up the Quality of Service requested by the end points; be extensible to help with adding new features easily; support interoperability among different vendors implementations, among different versions of the signaling protocol, and with different signaling protocols. 5/4/2006 CprE: 550 3

4 Multimedia Protocol Stack 5/4/2006 CprE: 550 4

5 Registration Process 5/4/2006 CprE: 550 5

6 SIP COMPONENTS AND MESSAGES Invite: Indicates that the user or service is being invited to participate in a session. Ack: Confirms the client has received a final response to an Invite request. Options: Is used to query a server about its capabilities. Bye: Is sent by a User Agent Client to indicate to the server that it wished to release the call. Cancel: Is used to cancel a pending request. Register: Is used by a client to register an address with a SIP server 5/4/2006 CprE: 550 6

7 SIP COMPONENTS AND MESSAGES 1xx: Informational- The request has been received and processing is continuing. 2xx: Success An Ack, which indicated that the action was successfully received, understood, and accepted. 3xx: Redirection Further action is required to process this request. 4xx: Client Error The request contains bad syntax and cannot be fulfill at this server. 5xx: Server Error The server failed (for internal reasons) to fulfill an apparently valid request. 6xx: Global Failure The request cannot be fulfilled at any server. 5/4/2006 CprE: 550 7

8 Architecture 5/4/2006 CprE: 550 8

9 Signaling Systems and Messages IP Telephone Voip-PSTN Gateway PSTN PSTN Analog Telephone Voip-Neowork Signaling Inter-exchange Signaling (SS&) Subscriber Loop SIgnaling 5/4/2006 CprE: 550 9

10 THE H.323 MULTIMEDIA STANDARD H.323 Terminal H.323 MCU Packet Based Network H.323 Gatekeep er H.323 Gateway H.323 Terminal H.323 Terminal 5/4/2006 CprE:

11 SIMULATION #1 WITH WESTPLAN SIMULATOR 5/4/2006 CprE:

12 Link Summary 5/4/2006 CprE:

13 Optimization results 5/4/2006 CprE:

14 Link Traffic analysis: Node Transmission medium Entry Network resource Entry network voice channels Ames PSTN - Waterloo IPBX T1 (24 B channels); 1 trunk 24 DesMoines IPBX - Waterloo IPBX Voice over IP (PPP) 512 kbps 40 Ames PSTN - DesMoines IPBX T1 (24 B channels) 1 trunk 24 DesMoines IPBX - Fayette Gateway Voice over IP (PPP) 256 kbps 20 Fayette Gateway - West Union PBX Analogue 15 trunks 15 Independence PSTN - West Union PBX T1 (24 B channels) 1 trunk 24 Fayette Gateway - Independence PSTN T1 (24 B channels) 1 trunk 24 5/4/2006 CprE:

15 Link and Traffic Analysis Node Busy hour offered traffic Entry network blocking Required voice channels Required link resource Ames PSTN - Waterloo IPBX Erlangs T1 trunks DesMoines IPBX - Waterloo IPBX Erlangs kbps Ames PSTN - DesMoines IPBX Erlangs T1 trunks DesMoines IPBX - Fayette Gateway Erlangs kbps Fayette Gateway - West Union PBX Erlangs analogue trunks. Independence PSTN - West Union PBX Erlangs T1 trunks Fayette Gateway - Independence PSTN Erlangs T1 trunk Node Link type Entry network facilities Ames PSTN - Waterloo IPBX DesMoines IPBX - Waterloo IPBX Ames PSTN - DesMoines IPBX DesMoines IPBX - Fayette Gateway Fayette Gateway - West Union PBX Independence PSTN - West Union PBX Fayette Gateway - Independence PSTN Entry network channels Busy hour traffic Blocking experienced Optimum voice channels Entry network facilities T1 (24B) 1 trunk trunks VoIP (PPP) 512 kbps kbps T1 (24B) 1 trunk trunks VoIP (PPP) 256 kbps kbps Analogue 15 trunks trunks T1 (24B) 1 trunk trunks T1 (24B) 1 trunk trunk 5/4/2006 CprE:

16 Conclusion Questions? 5/4/2006 CprE: