voice over ip
DESCRIPTION
Voice Over IP. Section 1: VoIP Basics Section 2: VoIP at ECU. Christopher P. Furner April 2002 DSCI 4123, 002. Section 1 ~ VoIP Basics. Transfers through Routers, LAN Switches etc, using their Protocols. Definitions [1]. Internet Protocol (IP) Private Branch Exchange (PBX) Gateway - PowerPoint PPT PresentationTRANSCRIPT
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?