FurnerFurner

Voice Over IPVoice Over IP

Section 1: VoIP BasicsSection 1: VoIP Basics

Section 2: VoIP at ECUSection 2: VoIP at ECU

Christopher P. FurnerApril 2002DSCI 4123, 002

FurnerFurner

Section 1 ~ VoIP BasicsSection 1 ~ VoIP Basics

Analog D ig ita l Vo ice

Transfers through Routers, LAN Switches etc, using their Protocols

FurnerFurner

Definitions [1]Definitions [1] Internet Protocol (IP)Internet Protocol (IP) Private Branch Exchange (PBX)Private Branch Exchange (PBX) GatewayGateway Public Switched Telephone NetworkPublic Switched Telephone Network Public Switched Data NetworkPublic Switched Data Network CoCoder/der/DecDecoder (Codec)oder (Codec)

FurnerFurner

From Voice to DataFrom Voice to DataAnalog

Digital

Voice

CODEC: Analog to Digital

Compress

Create Voice Datagram

Add Header(RTP, UDP, IP, etc)

N etw ork

FurnerFurner

From Data to VoiceFrom Data to VoiceDigital

AnalogVoice

Process Header

Re-sequence and Buffer Delay

Decompress

CODEC: Digital to Analog

N etw ork

FurnerFurner

Origin of Standards Origin of Standards [4][4]

Internet Engineering Task Force [6]

International Telecommunication Union

FurnerFurner

Protocols Protocols [2][2]H.323 components

H323 : Standard for multimedia communication over IP

H.323 Functions: System and components H.323 Call model descriptions H.323 System control

Call Seup H.225 (Q.931)Channel negotiation H.245

Audio coding, compression G.711, G.7222, G.723 G.723.1, G.729 Video coding, compression H.261, H.263 Data T.120

FurnerFurner

How VoIP Works How VoIP Works [2][2]

Com puter

Telephone

Com puter

InternetISP

GatewaysRouters

ISPGatewaysRouters

Local loopLocal loop

TILine

PublicSwitch(LEC)

Te lphone

PublicSwitch(LEC)

TILine

VoIP Typical Configuration

H.323 H.323

FurnerFurner

Voice Over IP Phone [3]Voice Over IP Phone [3]

Costs $361Built In Browser

Has MAC Address

FurnerFurner

Advantages of VoIPAdvantages of VoIP

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

FurnerFurner

Traffic Related Traffic Related Network CharacteristicsNetwork Characteristics

Voice Data

No Loss No Loss No retransmissionNo retransmission Direct Pass Direct Pass

ThroughThrough

Packet LossPacket Loss RetransmissionRetransmission Uses protocolsUses protocols

FurnerFurner

Section 2Section 2

–VoIP At ECUVoIP At ECU

FurnerFurner

Section 2: VoIP At ECUSection 2: VoIP At ECU

March 2001, ECU’s first successful calls March 2001, ECU’s first successful calls were placed across the Internet Link to were placed across the Internet Link to North Carolina State University.North Carolina State University.

Voice quality was excellent and no Voice quality was excellent and no problems were experienced. problems were experienced.

Currently all VoIP phones are routing Currently all VoIP phones are routing PSTN calls via the gateway. PSTN calls via the gateway.

FurnerFurner

ECU as VoIP LeaderECU as VoIP Leader

Mr. Jackson at Conference in Mr. Jackson at Conference in NovemberNovember

Reported Great SuccessReported Great Success

FurnerFurner

Other NC Schools Other NC Schools Interested in VoIPInterested in VoIP

UNC Chapel HillUNC Chapel Hill North Carolina State UniversityNorth Carolina State University UNC WilmingtonUNC Wilmington

FurnerFurner

ECU’s DistinctionECU’s Distinction

Only University to use VoIP 100% Only University to use VoIP 100% independent from regular Phone independent from regular Phone SystemSystem– VoIP will work if our phone system goes VoIP will work if our phone system goes

downdown

FurnerFurner

VoIP Workshop & VoIP Workshop & TOS Priority Model [3]TOS Priority Model [3]

6: Network Control6: Network Control5: Voice (Highest Priority)5: Voice (Highest Priority)4: Video (Telecast, Videoconferencing)4: Video (Telecast, Videoconferencing)3: Not Used3: Not Used2, 1, 0: Normal Data Traffic2, 1, 0: Normal Data Traffic

Differs from Standard QOS architecture Differs from Standard QOS architecture [5], Page. 116[5], Page. 116

FurnerFurner

Dual Environment [3]Dual Environment [3]

ECU Currently uses both the old ECU Currently uses both the old switch and VoIP for voice.switch and VoIP for voice.

$12,000,000.00 Switch (DMS)$12,000,000.00 Switch (DMS)

35 Phones Across Campus35 Phones Across Campus– Running Very WellRunning Very Well

FurnerFurner

Funding IssuesFunding Issues

Funding Cutting Edge Technology Funding Cutting Edge Technology Difficult in a Large OrganizationDifficult in a Large Organization

Recent Budget CutsRecent Budget Cuts

No Funding for Next SemesterNo Funding for Next Semester

FurnerFurner

Context Diagram [3]Context Diagram [3]

FurnerFurner

Deployment Diagram [3]Deployment Diagram [3]

FurnerFurner

IntelligenceIntelligence

With Conventional Phones, more With Conventional Phones, more then 95% resides within the Call then 95% resides within the Call ManagerManager

With VoIP, Call Manager only With VoIP, Call Manager only connects call, then gets out of way.connects call, then gets out of way.

In VoIP, 30% of Intelligence resides In VoIP, 30% of Intelligence resides within the Hosts (phones)within the Hosts (phones)

FurnerFurner

Phones, A Closer Look [3]Phones, A Closer Look [3] Cost $361Cost $361

– Own Mac AddressOwn Mac Address– Soft KeysSoft Keys– 6 Lines6 Lines– Do Not require Line CardDo Not require Line Card– Built In BrowserBuilt In Browser

A Comparable standard Business A Comparable standard Business Phone costs around $500Phone costs around $500– Requires a $200 Line CardRequires a $200 Line Card

FurnerFurner

Exciting Features [3]Exciting Features [3]

Integration with Existing DatabasesIntegration with Existing Databases– Exchange DirectoryExchange Directory– CalendarsCalendars

Integration with E-mailIntegration with E-mail– .wav Messages.wav Messages

FurnerFurner

Exciting Features [3]Exciting Features [3] Speech Recognition PotentialSpeech Recognition Potential

– Dictation Dictation – Text E-mail MessagesText E-mail Messages

Compatible with WirelessCompatible with Wireless– SpectraLink offers VoIP using Cellular SpectraLink offers VoIP using Cellular

TechnologyTechnology– Access Points Allow VoIPAccess Points Allow VoIP– However a Carrier needs to pick up the However a Carrier needs to pick up the

signal when user leaves AP’s Rangesignal when user leaves AP’s Range

FurnerFurner

VoIP’s Future at ECU [3]VoIP’s Future at ECU [3]

Will Continue to Use a Dual Enviroment Will Continue to Use a Dual Enviroment until full switchover is cost effectiveuntil full switchover is cost effective

Expect Cotanch building to be all VoIP by Expect Cotanch building to be all VoIP by end of Mayend of May

Expect to be 165 Phones Strong by AugustExpect to be 165 Phones Strong by August New Science and Technology Building will New Science and Technology Building will

be 100% VoIP, and be 100% Compatible be 100% VoIP, and be 100% Compatible with Wireless and Gigabit t-100 Bladeswith Wireless and Gigabit t-100 Blades

FurnerFurner

VoIP’s Future at ECU [3]VoIP’s Future at ECU [3]

Introduction into Residence HallsIntroduction into Residence Halls– 1 Phone per room with 2 lines and 2 1 Phone per room with 2 lines and 2

distinct Ringsdistinct Rings– WirelessWireless

Need to find a CarrierNeed to find a Carrier

FurnerFurner

Works CitedWorks Cited

[1] Shafer, Kevin. [1] Shafer, Kevin. Novell’s Dictionary Novell’s Dictionary of Networkingof Networking. 2002. P242. 2002. P242

[2] [2] How IP Telephony WorksHow IP Telephony Works Online Online [3] Interview with Martin Jackson[3] Interview with Martin Jackson

– 04/11/0204/11/02 [4] [4] What is Internet TelephonyWhat is Internet Telephony

OnlineOnline

FurnerFurner

Works CitedWorks Cited

[5] Muller, Nathan J. [5] Muller, Nathan J. Desktop Desktop Encyclopedia of the Internet.Encyclopedia of the Internet. 2002. 2002.

6: 6: Internet Engineering Task Force: OveInternet Engineering Task Force: Overviewrview. Online. Online

FurnerFurner

Thank YOUThank YOU

Questions?Questions?