VoIP

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VoIP
-----Voice over Internet Protocol

• 03 ???
• 29 ???
• 58 ???

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????
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?What Is VoIP? ?The Advantages of VoIP
3 ??? ???Hey Its show time
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What Is VoIP?

• Voice over Internet Protocol
• IP telephony
• ?IP?????????????

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How dose VoIP work?

• ???????????????(packge)
• ????????
• (PSTN)????gt????(VoIP)

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Analog?Digital
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Origin of VoIP

• 1995????Vocaltec ????????Internet Phone
• ???Alon Cohen ?Lior Haramaty

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Lior Haramaty
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Types of VoIP

• 1.PC to PC Ex
• 2.PC to Phone
• 3.Phone to Phone

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Why so cheap?

• ?? P2P ??

????????
?????,?????
?????,?????
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The Advantages of VoIP

• MOBILITY
• Globalization
• COST

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?Disadvantages of VoIP ?VoIP??????????
58 ??? ?? ? ???????????
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The Disadvantage of VoIP

• Security
• Quality
• Internet connection Power Supply
  Dependency
• 911 (Emergency Calls)

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Security

• Spoken Email
• Eavesdropping
• Unauthorized Access
• Dos (Denial of Service)
• SIP P2P
• Commit crimes

SPIT (Spam for Internet Telephony), Spam Call
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Quality

• Reasons?

• And the result
• Jitter, Packet loss, Echo

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Internet Connection Power Supply
Dependency

• Bandwidth dependent
• The quality of VoIP also has a lot to do with
  your Internet service / bandwidth!
• Power supply dependency
• Solution?
• ?UPS (uninterruptible power supply)

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911 (Emergency Calls)

• Regulation has been set up in America
• FCC (Federal Communication Commission)
• ?????????
• E911(enhanced 911)
• Situation in Taiwan

E911
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VoIP??????????

• ?????????
• ???????????????(?Skype??)
• ???????????????(?Yahoo!BB??)
• ?????????

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?????????

• ??????? ?????????
• ????
• ??????
• ??????? ????????????????, ????????

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???????????????(?Skype ??)

• ????
• Skype In / Out
• ????????????

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???????????????(?Yahoo!BB??)
?Broadband

• Yahoo!BB???NTT (Nippon Telegraph Telephone
  Crop.)??????
• Yahoo!BB???

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?????????

• 2006-11-01 NCC????????????
• 070??
• ???????
• ?????,????????
• ??????????
• ???

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?Demo ???
29 ??? ?? ? ??????!?!
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Welcome to the world of VoIP

• I have always wished that my computer would be as
  easy to use as my telephone. My wish has come
  true. I no longer know how to use my telephone.
• 
  ---Bjarne Stroustrup,
• 
  inventor of C language

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Features of Skype

• Skype in
• Skype out
• Skype zone
• Conference
• Voicemail Call forwarding
• Skypecast, SMS, chat

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Making A Call

• Step1??????,???????
• Step2??????

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Making A Call

• Step3????
• Step4???????????

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Skype in

• Step1?????????????

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Skype in

• Step2????

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Skype in

• Step3??????????
• Step4?????????????

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Skype out

• Step1click Dial
• Step2??????????????

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Skype Zone

• ?????18,000???Skype???????(hot spot)??Skype??????

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Voicemail Call Forwarding

• Tools/Voicemail or Call
• Forwarding or Options

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Voicemail Call Forwarding

• Check Forward calls when Im not on Skype
• Check Send unanswered calls to Skype Voicemail
• Record your welcoming message

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Conference

• Step1click conference
• Step2Choose conference name
• Step3Add contacts, 4 people at most

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Miscellaneous

• Skypecast
• SMS
• Chat (Public, Group)
• Privacy

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Price

• Skype in400/3month or 1200/year, come with
  voicemail
• Skype out0.677/min in most areas
• Voicemail 200/3month or 600/year
• SMS1.5 each
• Skype zone about 260/month
• Others FREE

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Other Providers

• MSN
• YAHOO
• IPBB(??)
• ??
• GOGOTALK

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Conclusion
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source

• http//www.ithome.com.tw/
• http//taiwan.cnet.com/?????
• http//www.google.com
• http//www.chihkang.com/voip_01.htm???????
• http//www.read.com.tw/web/hypage.cgi?HYPAGEsubje
  ct/sub_voip.asp
• ????????????
• http//www.skype.com Skype
• http//www.spectrum.ieee.org/mar05/2538
• Seven myths about VoIP
• http//www.wikipedia.org Wikipedia