Furner Voice Over IP Section 1: VoIP Basics Section 2: VoIP at ECU Christopher P. Furner April 2002 DSCI 4123, 002

Furner Section 1 ~ VoIP Basics Transfers through Routers, LAN Switches etc, using their Protocols

Furner Definitions [1]  Internet Protocol (IP)  Private Branch Exchange (PBX)  Gateway  Public Switched Telephone Network  Public Switched Data Network  Coder/Decoder (Codec)

Furner From Voice to Data Analog Digital Voice CODEC: Analog to Digital Compress Create Voice Datagram Add Header (RTP, UDP, IP, etc)

Furner From Data to Voice Digital Analog Voice Process Header Re-sequence and Buffer Delay Decompress CODEC: Digital to Analog

Furner Origin of Standards [4] [4] Internet Engineering Task Force [6][6] International Telecommunication Union

Furner Protocols [2] [2]

Furner How VoIP Works [2] [2]

Furner Voice Over IP Phone [3] Costs $361 Built In Browser Has MAC Address

Furner Advantages of VoIP  More Efficient Use of Network [2] [2]  Integration Capabilities [3]  Improved Voice Quality [3]  Wireless Capabilities [3]  Less Workload on Call Manager [3]

Furner Traffic Related Network Characteristics Voice Data  No Loss  No retransmission  Direct Pass Through  Packet Loss  Retransmission  Uses protocols

Furner Section 2 –VoIP At ECU

Furner Section 2: VoIP At ECU  March 2001, ECU’s first successful calls were placed across the Internet Link to North Carolina State University.  Voice quality was excellent and no problems were experienced.  Currently all VoIP phones are routing PSTN calls via the gateway.

Furner ECU as VoIP Leader  Mr. Jackson at Conference in November  Reported Great Success

Furner Other NC Schools Interested in VoIP  UNC Chapel Hill  North Carolina State University  UNC Wilmington

Furner ECU’s Distinction  Only University to use VoIP 100% independent from regular Phone System –VoIP will work if our phone system goes down

Furner VoIP Workshop & TOS Priority Model [3] 6: Network Control 5: Voice (Highest Priority) 4: Video (Telecast, Videoconferencing) 3: Not Used 2, 1, 0: Normal Data Traffic Differs from Standard QOS architecture [5], Page. 116

Furner Dual Environment [3]  ECU Currently uses both the old switch and VoIP for voice.  $12,000, Switch (DMS)  35 Phones Across Campus –Running Very Well

Furner Funding Issues  Funding Cutting Edge Technology Difficult in a Large Organization  Recent Budget Cuts  No Funding for Next Semester

Furner Context Diagram [3]

Furner Deployment Diagram [3]

Furner Intelligence  With Conventional Phones, more then 95% resides within the Call Manager  With VoIP, Call Manager only connects call, then gets out of way.  In VoIP, 30% of Intelligence resides within the Hosts (phones)

Furner Phones, A Closer Look [3]  Cost $361 –Own Mac Address –Soft Keys –6 Lines –Do Not require Line Card –Built In Browser  A Comparable standard Business Phone costs around $500 –Requires a $200 Line Card

Furner Exciting Features [3]  Integration with Existing Databases –Exchange Directory –Calendars  Integration with –.wav Messages

Furner Exciting Features [3]  Speech Recognition Potential –Dictation –Text Messages  Compatible with Wireless –SpectraLink offers VoIP using Cellular Technology –Access Points Allow VoIP –However a Carrier needs to pick up the signal when user leaves AP’s Range

Furner VoIP’s Future at ECU [3]  Will Continue to Use a Dual Enviroment until full switchover is cost effective  Expect Cotanch building to be all VoIP by end of May  Expect to be 165 Phones Strong by August  New Science and Technology Building will be 100% VoIP, and be 100% Compatible with Wireless and Gigabit t-100 Blades

Furner VoIP’s Future at ECU [3]  Introduction into Residence Halls –1 Phone per room with 2 lines and 2 distinct Rings –Wireless  Need to find a Carrier

Furner Works Cited  [1] Shafer, Kevin. Novell’s Dictionary of Networking P242  [2] How IP Telephony Works Online How IP Telephony WorksHow IP Telephony Works  [3] Interview with Martin Jackson –04/11/02  [4] What is Internet Telephony Online What is Internet TelephonyWhat is Internet Telephony

Furner Works Cited  [5] Muller, Nathan J. Desktop Encyclopedia of the Internet  6: Internet Engineering Task Force: Overview. Online Internet Engineering Task Force: OverviewInternet Engineering Task Force: Overview

Furner Thank YOU Questions?