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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

V.O.I.P

Voice on Internet Protocol

By

Matthew Bulat

M.Eng.Tech MCSE MCDBA BOCP


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


Soft phone pabx extension virtual private network compatible
Soft phone PABX Extension Virtual Private Network compatible


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)


Security
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


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)



Resources
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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