Voice over Internet Protocol (VoIP) MIS 304 December 3, 2009 Presented by group 7 : Cassie...
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Transcript of Voice over Internet Protocol (VoIP) MIS 304 December 3, 2009 Presented by group 7 : Cassie...
Voice over Internet Protocol Voice over Internet Protocol (VoIP) (VoIP)
MIS 304MIS 304December 3, 2009December 3, 2009
Presented by group 7Presented by group 7
: Cassie Macapinlac, Jolly Phan: Cassie Macapinlac, Jolly Phan
Thomas Cooper, Kyoung In Kim, Norinao HarunaThomas Cooper, Kyoung In Kim, Norinao Haruna
ContentsContents
1. Introduction 1. Introduction
2. History of VoIP2. History of VoIP
3. Background Information3. Background Information
4. Benefits of Using VoIP 4. Benefits of Using VoIP
5. Business Culture and VoIP5. Business Culture and VoIP
6. Challenges of VoIP6. Challenges of VoIP
7. Conclusion 7. Conclusion
IntroductionIntroduction
• Voice over Internet Protocol (VoIP)Voice over Internet Protocol (VoIP) A technology that helps communications which A technology that helps communications which
allows consumers to make and receive phone calls allows consumers to make and receive phone calls over broadband internet connections instead of using over broadband internet connections instead of using typical analog telephone landlines such as PSTN.typical analog telephone landlines such as PSTN.
HistoryHistory
• 1995- Vocaltec, Inc. introduced its 1995- Vocaltec, Inc. introduced its Internet Phone software. Internet Phone software.
• 2000- Networking manufacturers 2000- Networking manufacturers introduce equipment to routes introduce equipment to routes
and and switches VoIP traffic. switches VoIP traffic.• 2004- Commercial VoIP services were 2004- Commercial VoIP services were
provided over broadband internet provided over broadband internet access as a major access as a major
development. development. • 2009- 256 million users of VoIP around 2009- 256 million users of VoIP around
the world. the world.
How It WorksHow It Works
Three Methods of Connecting to VoIPThree Methods of Connecting to VoIP
• Analog Telephone Adapter (ATA) Analog Telephone Adapter (ATA) • VoIP phones VoIP phones • Computer-to-ComputerComputer-to-Computer
Analog Telephone Adapter (ATA)Analog Telephone Adapter (ATA)
• Analog to digital converter that Analog to digital converter that allows you to connect standard allows you to connect standard phones to your computer or your phones to your computer or your internet connection.internet connection.
VoIP Phones VoIP Phones
• Which looks like an ordinary corded Which looks like an ordinary corded or cordless telephone and is or cordless telephone and is dedicated as an actual phone that dedicated as an actual phone that allow calls without using the allow calls without using the computercomputer
Computer-to-ComputerComputer-to-Computer
• Installed software on a computer which Installed software on a computer which allows VoIP calling without a dedicated allows VoIP calling without a dedicated hardware. hardware.
Benefits of VoIPBenefits of VoIP
• Save money and cost efficient• Integration with audio, data, and video
applications• Flexibility• Ability to choose our own area codes• Offer features for free
• Save money and cost efficientSave money and cost efficientUsing VoIP, a lot cheaper than our normal landline Using VoIP, a lot cheaper than our normal landline
telephone cost, be it short or long distance calls. telephone cost, be it short or long distance calls.
(for use of both residence and business(for use of both residence and business)
Benefits of VoIPBenefits of VoIP
• Integration with Audio, Data, and Integration with Audio, Data, and
Video Applications Video Applications we can save more money and energy by using our we can save more money and energy by using our
phone while accessing all our other programs and phone while accessing all our other programs and
surf the Internet at the same timesurf the Internet at the same time
Benefits of VoIPBenefits of VoIP
• FlexibilityFlexibility
We can take our VoIP Adaptors anywhere and use We can take our VoIP Adaptors anywhere and use
our number anywhere there's an Internet our number anywhere there's an Internet connection(Travelling overseas, staying in hotels, connection(Travelling overseas, staying in hotels, etc..)etc..)
Benefits of VoIPBenefits of VoIP
• Ability to choose our own area Ability to choose our own area
codescodesBy having the ability to choose our own area code, By having the ability to choose our own area code, they are able to call us and will be charged as a local they are able to call us and will be charged as a local call (they don’t have to pay for long distance call (they don’t have to pay for long distance charges). charges).
Benefits of VoIPBenefits of VoIP
• Offer Features for FreeOffer Features for Free
Features that typically cost extra with normal phones Features that typically cost extra with normal phones are bundled with VoIP.are bundled with VoIP.
(features: Voice Mail, Call Forwarding, Call Waiting)(features: Voice Mail, Call Forwarding, Call Waiting)
Benefits of VoIPBenefits of VoIP
Business Culture and VoIPBusiness Culture and VoIP
• CultureCulture
Development or improvement of Development or improvement of education or training.education or training.
• Business CultureBusiness Culture
Refers to the punctuality, risk, Refers to the punctuality, risk, power distance, making decisions, power distance, making decisions, and Business Contacts of the and Business Contacts of the organization.organization.
• Virtual work Virtual work
““Work performed away from the traditional physical Work performed away from the traditional physical workplace by means of information technology.”workplace by means of information technology.”
Business Culture and VoIPBusiness Culture and VoIP
Business Culture and VoIPBusiness Culture and VoIP
• VoIP affects distant communication VoIP affects distant communication in the business world to a more in the business world to a more meaningful and timely direction, meaningful and timely direction, making the business culture making the business culture communication, power distance, communication, power distance, decision making seemingly more decision making seemingly more leisurely.leisurely.
Business Culture and VoIPBusiness Culture and VoIP
• Advancing Technology Makes lives, Advancing Technology Makes lives, in the business world, easier.in the business world, easier.
• There is no long distance fees for There is no long distance fees for calls either!calls either!
• Communication brings two people Communication brings two people together, one conveys a message together, one conveys a message and the other interprets it.and the other interprets it.
• Emails are broad and do not convey Emails are broad and do not convey a interactive message.a interactive message.
• VoIP does convey VoIP does convey
a meaningful, a meaningful,
interactive, imely,interactive, imely,
and relevant message.and relevant message.
Business Culture and VoIPBusiness Culture and VoIP
Challenges of VoIPChallenges of VoIP
• Level of service qualityLevel of service quality
Data travels with fixed maximum capacityData travels with fixed maximum capacity-Prone to congestion & Denial-of-Service Attacks-Prone to congestion & Denial-of-Service Attacks
Quality of Service (QoS)Quality of Service (QoS)- Jitter- Jitter- Latency- Latency
Possible counterattacks?Possible counterattacks? -Teletraffic engineering -Teletraffic engineering
- Multi-path routing - Multi-path routing
• Bandwidth DifferenceBandwidth Difference
Bandwidth Bandwidth Range of frequencies through which data is transmitted. Range of frequencies through which data is transmitted. Often associated with “connection speed.”Often associated with “connection speed.”
Greater connection speed, better the qualityGreater connection speed, better the quality No internet, no phone lineNo internet, no phone line
- Annoying at home- Annoying at home- Catastrophic for businessCatastrophic for business
Challenges of VoIPChallenges of VoIP
Shared connectionShared connection- Multiple users = difficult to provide to adequate- Multiple users = difficult to provide to adequate- Bandwidth all the time- Bandwidth all the time
Solution?Solution?- Minimize Internet connection Minimize Internet connection
usage for things otherusage for things other than VoIP during conversations.than VoIP during conversations.
Challenges of VoIPChallenges of VoIP
• Power DifferencesPower Differences
Susceptible to Power FailuresSusceptible to Power Failures- Modems, routers, ATA or other VoIP hardware- Modems, routers, ATA or other VoIP hardware require electric power supplies to work require electric power supplies to work - Power interruptions mean no service! - Power interruptions mean no service!
Possible solution?Possible solution?- Use customer premise equipment (like cable - Use customer premise equipment (like cable
modems) with battery-backed power supplies modems) with battery-backed power supplies - Assures uninterrupted service for up to several - Assures uninterrupted service for up to several
hourshours
Challenges of VoIPChallenges of VoIP
• Security issueSecurity issue
Susceptible to attack like any other internet-connected Susceptible to attack like any other internet-connected devicedevice
Hackers can Hackers can -Institute denial-of-service attacks-Institute denial-of-service attacks -Harvest customer data-Harvest customer data -Record conversations -Record conversations -Break into voice mailboxes-Break into voice mailboxes
Challenges of VoIPChallenges of VoIP
Many do not support encryptionMany do not support encryption -Relatively “easy” to eavesdrop on VoIP calls and even -Relatively “easy” to eavesdrop on VoIP calls and even change their contentchange their content
Possible solutions? Possible solutions? To protect confidential & classified conversations:To protect confidential & classified conversations: -Voice over Secure IP (VoSIP)-Voice over Secure IP (VoSIP) -Secure Voice over IP (SVoIP)-Secure Voice over IP (SVoIP) -Secure Voice over Secure IP (SVoSIP) -Secure Voice over Secure IP (SVoSIP)
Challenges of VoIPChallenges of VoIP
• Emergency callEmergency call
No relationship between IP addressNo relationship between IP address and and physical locationphysical location -Address reveals no useful information for emergency -Address reveals no useful information for emergency services.services. -Cannot easily be routed to a nearby call center-Cannot easily be routed to a nearby call center IP addressesIP addresses
- Dynamically assigned - Dynamically assigned - ISP allocates an address for online access or the ISP allocates an address for online access or the
time a broadband router is engaged. time a broadband router is engaged. - ISP recognizes individual IP addresses, but not the ISP recognizes individual IP addresses, but not the
corresponding physical locationcorresponding physical location
Challenges of VoIPChallenges of VoIP
Possible solution?Possible solution? -Use a database to find that user and the physical -Use a database to find that user and the physical address the user chose to associate with that telephone address the user chose to associate with that telephone number—imperfect solution. Ex: VoIP Enhanced 911number—imperfect solution. Ex: VoIP Enhanced 911
Challenges of VoIPChallenges of VoIP
• Legal issueLegal issue
Issues about Foreign Intelligence Surveillance ActIssues about Foreign Intelligence Surveillance Act
National Security Agency (NSA)National Security Agency (NSA)
Federal Communications Commission (FCC)Federal Communications Commission (FCC)
Some places have banned ALL VoIP technologiesSome places have banned ALL VoIP technologies
Challenges of VoIPChallenges of VoIP
ConclusionConclusion
Question & Comments???Question & Comments???