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Today’s Converged Networks © 2004 Cisco Systems, Inc. All rights reserved. Presentation_ID Voice over IP (VoIP) IP Network...
Traditional Call Centre Set Up Call Centre Server ACD/PBX PSTN Customer CTI Interface LAN PBX Extensions Agent Stations AC...
What is VoIP? <ul><li>VoIP let you make toll-free long distance voice and fax calls over existing IP data networks instead...
VoIP vs circuit networks <ul><li>POTS (Plain Old Telephone Systems) used circuit switching techniques </li></ul><ul><li>On...
Example of VoIP networks <ul><li>PC (software) to PC (software) by home users </li></ul><ul><li>PC to phone </li></ul><ul>...
VoIP services <ul><li>Skype </li></ul><ul><li>Vonage </li></ul><ul><li>FreeWorldDialup </li></ul><ul><li>Brekeke </li></ul...
Equipment needed <ul><li>An IP Network </li></ul><ul><li>VoIP Server </li></ul><ul><li>PC with VoIP software or VoIP phone...
 
VoIP protocols <ul><li>Most popular VoIP protocols </li></ul><ul><ul><li>H.323 ( http://openh323.org ) </li></ul></ul><ul>...
ITU:H.323 Standard <ul><li>Application Layer Protocol </li></ul><ul><li>Binary based protocol  </li></ul><ul><li>Full deta...
SIP Standard <ul><li>SIP = Session Initiation Protocol </li></ul><ul><li>Text based protocol, similar to HTTP </li></ul><u...
SIP addressing <ul><ul><li>The SIP address is identified by a SIP URL, in the format: user@host.  </li></ul></ul><ul><ul><...
Useful SIP server and IP soft phone <ul><li>SIP Server:  </li></ul><ul><ul><li>OnDo SIP server </li></ul></ul><ul><ul><li>...
References <ul><li>http://wireless.ictp.trieste.it/school_2005/lectures/dillo/ICTP_VOIP_II.pdf </li></ul><ul><li>http://ww...
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  • Types of VoIP application On-site IP telephony Corporate toll by-pass Voice over the net Fax over the net IP-based public phone services Voice messaging over the internet Video over IP Call centre IP telephony
  • Transcript of "VoIP.ppt"

    1. 1. Today’s Converged Networks © 2004 Cisco Systems, Inc. All rights reserved. Presentation_ID Voice over IP (VoIP) IP Network Telephone Network Broadcast Network IP Network Storage Area Network Voice Video Data Storage
    2. 2. Traditional Call Centre Set Up Call Centre Server ACD/PBX PSTN Customer CTI Interface LAN PBX Extensions Agent Stations ACD/PBX
    3. 3. What is VoIP? <ul><li>VoIP let you make toll-free long distance voice and fax calls over existing IP data networks instead of public switched telephone network (PSTN). </li></ul><ul><li>VoIP solution can dramatically cut long distance call charges between two or more locations. </li></ul>
    4. 4. VoIP vs circuit networks <ul><li>POTS (Plain Old Telephone Systems) used circuit switching techniques </li></ul><ul><li>Only 40-50% bandwidth used </li></ul><ul><li>Cheaper cost </li></ul><ul><li>Pay back period is short </li></ul>
    5. 5. Example of VoIP networks <ul><li>PC (software) to PC (software) by home users </li></ul><ul><li>PC to phone </li></ul><ul><li>Phone to Phone </li></ul><ul><li>Inter Offices (across national/international) Voice Traffic is Toll Free </li></ul>
    6. 6. VoIP services <ul><li>Skype </li></ul><ul><li>Vonage </li></ul><ul><li>FreeWorldDialup </li></ul><ul><li>Brekeke </li></ul><ul><li>Yourself ! </li></ul>
    7. 7. Equipment needed <ul><li>An IP Network </li></ul><ul><li>VoIP Server </li></ul><ul><li>PC with VoIP software or VoIP phone </li></ul><ul><li>VoIP adapter </li></ul>
    8. 9. VoIP protocols <ul><li>Most popular VoIP protocols </li></ul><ul><ul><li>H.323 ( http://openh323.org ) </li></ul></ul><ul><ul><li>SIP ( http://www.sipforum.org/index.php ) </li></ul></ul><ul><li>Both support features like VoIP, Fax over IP and video conferencing </li></ul><ul><li>H.323 covers almost every service available but is harder to implement than SIP </li></ul>
    9. 10. ITU:H.323 Standard <ul><li>Application Layer Protocol </li></ul><ul><li>Binary based protocol </li></ul><ul><li>Full detail of H.323 standard on http://www.protocols.com/pbook/h323.htm </li></ul>
    10. 11. SIP Standard <ul><li>SIP = Session Initiation Protocol </li></ul><ul><li>Text based protocol, similar to HTTP </li></ul><ul><li>Initiating interactive communication session between users (voice, video, chat, interactive game and virtual reality) </li></ul>
    11. 12. SIP addressing <ul><ul><li>The SIP address is identified by a SIP URL, in the format: user@host. </li></ul></ul><ul><ul><li>Examples of SIP URLs: </li></ul></ul><ul><ul><ul><li>sip:hostname@vovida.org </li></ul></ul></ul><ul><ul><ul><li>sip:m28@192.168.0.5 </li></ul></ul></ul><ul><ul><ul><li>sip:294284@www.staffs.ac.uk </li></ul></ul></ul>
    12. 13. Useful SIP server and IP soft phone <ul><li>SIP Server: </li></ul><ul><ul><li>OnDo SIP server </li></ul></ul><ul><ul><li>Router with built-in VoIP features </li></ul></ul><ul><li>IP soft phones: </li></ul><ul><ul><li>Windows Messenger 5.0 or higher </li></ul></ul><ul><ul><li>SJPhone </li></ul></ul>
    13. 14. References <ul><li>http://wireless.ictp.trieste.it/school_2005/lectures/dillo/ICTP_VOIP_II.pdf </li></ul><ul><li>http://www.intel.com/network/csp/downloads/8983.htm </li></ul><ul><li>http://openh323.org </li></ul><ul><li>http://www.sipforum.org/index.php </li></ul><ul><li>http://www.skype.com </li></ul>
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