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  1. 1. V.O.I.P Voice on Internet Protocol By Matthew Bulat M.Eng.Tech MCSE MCDBA BOCP
  2. 2. What is VOIP? <ul><li>Routing of voice conversations over the Internet or through any other IP-based network. </li></ul>
  3. 3. Why use VOIP? <ul><li>Cheaper telecommunications </li></ul><ul><li>Less phone line rental </li></ul><ul><li>Less wiring required </li></ul><ul><li>“ Free” phone calls in some situations </li></ul><ul><li>Video conferencing possibilities </li></ul><ul><li>Branch offices may not need a PABX </li></ul><ul><li>Use Wifi bridges to connect phone system </li></ul>
  4. 4. VOIP status now <ul><li>IP capable PBX becoming dominant </li></ul><ul><li>Skype have over 100 million users </li></ul><ul><li>VOIP service market increasing 62% / year </li></ul><ul><li>IDC Australia predicts that by 2009 there could be as many as half a million retail VOIP users in Australia </li></ul><ul><li>Ideal Electrical has VOIP enabled PBX </li></ul><ul><li>SA Government has VOIP enabled PBX </li></ul><ul><li>New Zealand Govt. had VOIP enabled PBX </li></ul>
  5. 5. What do I need for VOIP? <ul><li>A network connection LAN/WAN/Internet </li></ul><ul><li>Spare network bandwidth for VOIP call traffic </li></ul><ul><li>Quality of Service to give priority to voice traffic </li></ul><ul><li>Soft Phone software with headset or </li></ul><ul><li>Broadband Router with phone socket + phone or </li></ul><ul><li>Router + Analog Telephone Adapter + phone or </li></ul><ul><li>PABX with VOIP facilities </li></ul><ul><li>Wifi Router + Wifi phone handsets </li></ul>
  6. 6. When can I consider VOIP? <ul><li>When moving to a new building </li></ul><ul><li>When STD calls and International calls costs need to be reduced </li></ul><ul><li>When line rental fees need review </li></ul><ul><li>When new EFTPOS, fax, modems need to be added </li></ul><ul><li>If call count per month is high </li></ul>
  7. 7. Disadvantages of VOIP <ul><li>Quality of calls across Internet is not assured </li></ul><ul><li>Broadband equivalent connection needed for connecting offsite </li></ul><ul><li>Network switches may need replacement </li></ul><ul><li>Power on Ethernet may need to be established over the LAN </li></ul><ul><li>Phone availability is dependant on network hardware and power </li></ul><ul><li>Some VOIP providers have fees </li></ul><ul><li>Emergency calls 000 do not issue an origin </li></ul>
  8. 8. VOIP Alternatives <ul><li>Call cap plans with Telecommunications provider </li></ul><ul><li>Virtual fax lines that get sent to email </li></ul><ul><li>ISDN D channel for EFTPOS </li></ul><ul><li>Advanced forms of Instant messaging </li></ul><ul><li>Use mobile phones and reduce land lines </li></ul><ul><li>Least cost routing with various carrier prefixes </li></ul>
  9. 9. Soft Phone e.g. Skype <ul><li>Free software </li></ul><ul><li>Free Skype to Skype </li></ul><ul><li>Free Video Conferencing </li></ul><ul><li>Prepay to call real phones </li></ul><ul><li>Prepay for phone no. (10 Euro for 3 months) </li></ul><ul><li>Voicemail with phone no. </li></ul><ul><li>Send SMS from PC (has fee) </li></ul><ul><li>Can use wherever on broadband </li></ul><ul><li>Can work with Pocket PC wifi </li></ul>
  10. 10. VOIP with real phone e.g. Engin <ul><li>Analog Telephone Adapter $199 with phone socket </li></ul><ul><li>Phone number $9.95 per month </li></ul><ul><li>10 cent local and national calls un-timed </li></ul><ul><li>Can receive landline and VOIP line to 1 phone </li></ul><ul><li>Can fallback to landline if power/network fails </li></ul>
  11. 11. VOIP from router <ul><li>Use standard phones connected directly to router </li></ul><ul><li>Cheaper than router + analog telephone adapter </li></ul><ul><li>Quality of service provided at the router </li></ul>
  12. 12. Hybrid PABX inc. VOIP <ul><li>Adding hardware to existing PABX can gain VOIP between sites while leaving the office architecture the same </li></ul><ul><li>Calls can fallback to landlines if WAN is at capacity </li></ul><ul><li>VOIP can present itself as a PSTN line to the PABX for traditional use </li></ul><ul><li>Least Cost Routing can divert certain calls to VOIP system lines </li></ul>
  13. 13. Large PABX Multi site VOIP
  14. 14. Sample Large VOIP PABX features <ul><li>Up to 6000 extensions controlled by 2 RU device </li></ul><ul><li>Whole configuration is held in PC-card storage card which can be programmed offsite </li></ul><ul><li>Browser can be used to adjust configuration </li></ul><ul><li>Wireless LAN handsets </li></ul>
  15. 15. Soft phone PABX Extension Virtual Private Network compatible
  16. 16. Microsoft Office Communicator 2005 <ul><li>Talk, video conference, chat, whiteboard from PC and phone </li></ul><ul><li>Know current status of who you want to contact e.g.. At desk, away, on phone, in meeting, not logged in </li></ul><ul><li>Pop up when call comes in with caller details </li></ul><ul><li>Dial, transfer call from Outlook type list on PC </li></ul><ul><li>Missed calls can show up as a email, click to call back </li></ul><ul><li>Divert to a mobile when logged off PC </li></ul>
  17. 17. Office VOIP wiring <ul><li>One Cat-5 lead for phone and computer (1/2 cables) </li></ul><ul><li>PABX , network switch and Power on Ethernet need a good UPS. </li></ul><ul><li>Analog devices like faxes/modems need analog adapters </li></ul><ul><li>Branch to branch calls have no telephony fees </li></ul>
  18. 18. VOIP Management <ul><li>Using the LAN/WAN program phone systems across the Enterprise </li></ul><ul><li>Better GUI interfaces to control 100’s of possible features </li></ul><ul><li>Handset movements in the network keep there extension number as they go. </li></ul><ul><li>Web server interfaces for programming at different access levels possible </li></ul>
  19. 19. VOIP specs <ul><li>Clear voice communications can be had using 64kb bandwidth (both ways). E.g. G711 codec (~28 MB / hour) </li></ul><ul><li>With extra compression and processing time voice communication can get by with 8kb bandwidth. E.g. G729 codec (~3.6 MB / hour) </li></ul>
  20. 20. Security <ul><li>Maintain firewalls, anti virus, security patches, review logs, review activity </li></ul><ul><li>Select software that needs a minimum number of ports open. </li></ul><ul><li>Direct certain ports to defined IP addresses to handle the traffic. </li></ul><ul><li>Define what applications can use a port. </li></ul><ul><li>Encrypt voice signals and protocols used </li></ul><ul><li>IP handset MAC address permissions given by PABX </li></ul><ul><li>Wifi SSID, WEP/WPA, MAC address filtering </li></ul><ul><li>Secure VPN connections </li></ul>
  21. 21. New possibilities for telephony <ul><li>PABX – LAN ~ Wifi Bridge ~ LAN – computers and phones </li></ul><ul><li>No phone system needed in second building </li></ul><ul><li>No cabling required across roads, common land etc. </li></ul>
  22. 22. Remote Telephony <ul><li>Work from home using computer as a phone extension from work. </li></ul><ul><li>Work at multiple branches where your computer keeps its extension number as you move. </li></ul>
  23. 23. The Future <ul><li>Mobile phone that can do Wifi VOIP if in range </li></ul><ul><li>VOIP using Wimax (no phone lines required) </li></ul><ul><li>Internet / VOIP / Video on demand broadband </li></ul><ul><li>ISP’s working like carriers with Quality of Service for VOIP on their network </li></ul><ul><li>Wireless phones with Skype built in (2006 Q3) </li></ul>
  24. 24. Wifi Skype Phone with no PC
  25. 25. Resources <ul><li>www.phonechoice.com.au (includes calculator for plans based on your current usage) </li></ul><ul><li>www.OzInternetPhones.com.au (list providers) </li></ul><ul><li>http://www.erlang.com/calculator/lipb/ (voice paths to VOIP bandwidth calculator </li></ul><ul><li>www.voipnews.com.au </li></ul><ul><li>http://www.avoipa.org.au/ Aust. Comm. Industry Forum </li></ul><ul><li>http://www.acma.gov.au Aust. Comm. & Media Authority </li></ul>