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V.O.I.P. Voice on Internet Protocol By Matthew Bulat M.Eng.Tech MCSE MCDBA BOCP. What is VOIP?. Routing of voice conversations over the Internet or through any other IP-based network. Why use VOIP?. Cheaper telecommunications Less phone line rental Less wiring required

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v o i p


Voice on Internet Protocol


Matthew Bulat


what is voip
What is VOIP?
  • Routing of voice conversations over the Internet or through any other IP-based network.
why use voip
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
voip status now
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
what do i need for voip
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
when can i consider voip
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
disadvantages of voip
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
voip alternatives
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
soft phone e g skype
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
voip with real phone e g engin
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
voip from router
VOIP from router
  • Use standard phones connected directly to router
  • Cheaper than router + analog telephone adapter
  • Quality of service provided at the router
hybrid pabx inc voip
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
sample large voip pabx features
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
microsoft office communicator 2005
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
office voip wiring
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
voip management
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
voip specs
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)
  • 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
new possibilities for telephony
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.
remote telephony
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.
the future
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)
  • 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