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HIT 5327 Unit 3 Team Azure-Magenta

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Joshua Schutter

on 17 September 2012

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Transcript of HIT 5327 Unit 3 Team Azure-Magenta

Many iterations of Alexander Graham Bells original Invention Exist in our society THe Semantics of Phone Number Representation


Team Azure- Magenta
HIT 5327
UNit 3 Land Line Analog Wireless Cellular VOIP SeveralTypes of Phone Services Exist Spark Challenges of VOIP the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks VOIP
Voice over Internet Protocol Advantages over traditional analog phone lines substantial cost savings over traditional analog phone lines
increased security using standardized digital protocols Disadvantages over traditional analog phone lines decreased reliability of the network
subsceptibility to worms, viruses, and hacking
call quality affected by individual PC processor speed (Wikipedia, n.d. c) US Analog, Digital, and Cellular lines utilize E.164, and the North American Numbering Plan (NANP), for identifying and routing dialed numbers
VOIP uses IP addresses and does not directly utilize phone numbers based on NANP
IP addresses correspond to a particular device, but are not always static
VOIP's challenge is to translate NANP phone numbers to IP addresses and then determine the current IP address of the requested number (Valdes & Roos, 2007) Valdes, R., & Roos, D. (2007). How VoIP Works. Retrieved 9 12, 2012, from Howstuffworks.com: http://computer.howstuffworks.com/ip-telephony6.htm
Wikipedia. (n.d.). E.164. Retrieved 9 15, 2012, from Wikipedia: http://en.wikipedia.org/wiki/E.164
Wikipedia. (n.d.). North American Numbering Plan. Retrieved 9 15, 2012, from Wikipedia: http://en.wikipedia.org/wiki/North_American_Numbering_Plan
Wikipedia. (n.d.). Voice over IP. Retrieved 9 14, 2012, from Wikipedia: http://en.wikipedia.org/wiki/Voice_over_IP Standardized system of numbering plan areas (Wikipedia, n.d. b)
US, Canada, Bermuda, 17 Caribbean nations
3-digit Area Code and 7-digit telephone number
Enables routing calls via Public Switched Telephone Networks
Dailing Optoins
7-digit Number - Within single code area
Area Code + 7-digit Number - within multi-area code area
1 + Area Code + 7-digit Number - ourside of area code
Optional Supplemental Phonenumber Information Include:
Country Code - Only required for calls beyond NAPA countries
International Dailing Prefix - 01 prefix to designate an international call
Extension Numbers - typically at most 4-digits suffix
Automated phone navigation systems menu tree suffix
Pause/Flash characters (#) to support automated extensions
Room Number - Hotel or Hospital environment North America Numbering Plan (NAPA) ITU-T Recommendation that defines the International Public Telecommunication Numbering Plan (Wikipedia, n.d. a)

Enables routing calls via Public Switched Telephone Networks

Maximum of 15 digit phone numbers
First 1-3 digits for Country Codes
Remaining Digit Variations for
- Geographic Areas
- Global Services
- Networks
- Groups of countries E.164 References
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