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Transcript

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

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