PeachNet SM & IP Telephony E. Michael Staman Georgia Board of Regents [email protected]...

PeachNetPeachNetSMSM & IP Telephony & IP Telephony

E. Michael Staman

Georgia Board of Regents

[email protected]

(404) 656-6174

Vice Chancellor/CIO

Associate Vice Chancellor

Assistant Vice ChancellorInstructional Technology

Executive Director, Virtual Library, Customer & Info Services

PeachNet

PeopleSoft’s HR

Virtual Library

Virtual UniversityDistance Education

Faculty Development

Enterprise SupportSCT’s Banner

Help DeskPublications

Events Mgmt

PeachNetPeachNetSMSM & IP Telephony & IP Telephony

Alan M. Brown

Georgia Board of Regents

[email protected]

(404) 656-6174

Net@EDU Focus on IP TelephoneFebruary 1999 - Alan M. Brown© 1999 Georgia Board of Regent - PeachNet

AgendaAgenda

PeachNet & GeorgiaIP TelephonyTelephony in Georgia EducationIP Telephony - TechnologyPeachNet IP Telephony TrialsFutures


PeachNetPeachNet

Network for Education in GeorgiaMembers

– 51 University System– 159 Public Libraries– All 181 K-12 School Districts

• Plus 80 other K-12 Entities

– 26 Private Univ., Colleges, and Schools Administered by Board of Regents of

University System of Georgia (USG)


GeorgiaGeorgia

159 counties + ~ 800 cities~ 250 x 300 square miles34 Telcos5 full LATAs + 2 partialsMyriad education boards & agencies~ 3.5 M live in Atlanta toll-free zone~ 120 distinct toll-free zones


PeachNet in Transition - PeachNet in Transition - Yesterday’s Backbone NetworkYesterday’s Backbone NetworkIP Routed networkT1 leased circuitsNo IP MulticastSupports 300 56 Kb sites, 140 T1 sites,

some 2,3,4,5xT1 sitesCongested backbone links, up to 5 x T1

via multilink PPPFuture scalability was limited


PeachNet in Transition - PeachNet in Transition - Tomorrow’s Backbone NetworkTomorrow’s Backbone NetworkIP Optimized over ATM Switched netOC-12 fiber & OC-3 leased circuitsScalable through OC-48Supports 56 Kb through OC-3 sitesQuality of Service enabledIP Multicast enabledNetwork will be Ready! For what?


PeachNet - PeachNet - ATM CoreATM Core


PeachNet - PeachNet - ATM Core IP/ATM BackboneATM Core IP/ATM Backbone


PeachNet InfrastructurePeachNet Infrastructure

OSPF is IGP– 10 areas

23 major hub sites County hubs as

needed

Bandwidth will follow Moore’s Law (commodity?)


USG “Givens”USG “Givens”

IP will be the dominant and ubiquitous enterprise protocol for at least the next 10 years

Ethernet will continue to be the ubiquitous enterprise desktop connectivity for at least the next 10 years


AgendaAgenda



IP Telephony Opportunities?IP Telephony Opportunities?

Bypass long distanceReduce # of access linesCost savings, maybeConvergence of technologiesFocus on IP network, not multiple netsIntegration with videoIntegrated messaging


Carriers Are Thinking about Carriers Are Thinking about VoIPVoIPAT&T Global Clearinghouse for billing,

call admin., etc.; also testingICG Netcon On-Line testing now at 5.9

¢/min in 166 citiesQwest testing now at 7.5 ¢/min in 125

metropolitan service areasSprint testing now at 7.5 ¢/minPreparing tariffs


IP Telephony MarketIP Telephony Market

From GartnerGroup 1999/01/01– Although the Market for Internet-based

telephony should reach $3 billion by 2003, it will constitute just two tenths of 1 percent of the total network service market of $1.4 trillion.

– IP Telephony is in “Slow Growth” stage of technological maturity


AgendaAgenda



The State’s Telephony TodayThe State’s Telephony Today

Managed by State Telecom agency– 54 % overhead added by them

Leased ESSX/Centrex yields equivalent PBX functionality

State Telecom aggregates LD calls– Largest trunks are 4xT1 between LATAs

Insignificant vs. the 100xT1s of OC-3


USG LD Costs TodayUSG LD Costs Today

Total LD ~ $6,000,000 annually– Within Georgia ~ 10 ¢ per minute– Outside Georgia ~ 14 ¢ per minute– Credit Card ~ 15 ¢ per minute– Intra 40%, Inter 55%, Credit 5%– 63 million call minutes

If we could save 1/2 of it somehow …$6M x 40% x 1/2 is $1.2M


USG Local Service Costs TodayUSG Local Service Costs Today

Total local - $26,000,000 annually~ 35,000 (?) lines, excluding

dormitories


AgendaAgenda



IP Telephony as a TechnologyIP Telephony as a Technology

Circuit Switched Expensive Dedicated

bandwidth “Toll” quality Highly regulated

– Price– Service levels

Packet Switched Cheap (relatively) Shared bandwidth Quality affected by

delay and jitter Approaching “Toll”

quality Unregulated

(temporarily)


““Toll” QualityToll” Quality

Subjective measurementBetter than business quality

(cellular)Much less than audiophile wantsLevel of distortion

– Just perceptible– Not annoying


What Affects Quality?What Affects Quality?

Delay (latency)Delay variance (jitter)Echo (cancellation)Background noise (insertion)


Delay FactorsDelay Factors

Cumulative transmission path delayITU G.114 Recommendation is < 150

msec 1-way delayFixed: propagation, serialization,

processing (coding, compression)Variable: queuing, de-jitter buffers,

variable packet sizes (jumbograms)Dropped packets


What Helps Delay and Jitter?What Helps Delay and Jitter?

Congestion management (e.g., WFQ)Signaling (IP precedence, RSVP)Multilink PPPMTU size reductionRTP header compressionBetter compression w/DSPs

– CS-A CELP (G.729) 8 KbpsSilence suppression


Lab Test ResultsLab Test Results

BCR, published 01/1998– Tested 5 vendors– Latency down to 62 msec (one way)– Toll quality for all with ideal conditions– Toll quality for only one vendor with

poor network (10% IP packet error)– Bandwidth required down to 12 Kbps

(one way)


AgendaAgenda



Trial LD SolutionTrial LD Solution

Use existing telephones & PBXsUse standard interior phone linesKeep familiar dialing planRequires staged dial toneDial into Atlanta only; not symmetricLimited accountingAvoid becoming common carrier


Trial QuestionsTrial Questions

QualityCompatibility (with existing telco)Ease of useCosts projected for more sitesInteroperability (with other VoIP)Maximize throughput & minimize

latency, independent of traffic patterns


Equipment for TrialEquipment for Trial

Major dial areas Atlanta, Savannah,

Augusta, Athens, & Albany:

5 x Cisco 3640– 10 x Office ports– 2 x Station ports– Ethernet– $16,400 list each

Other dial areas Macon, Valdosta,

Statesboro, & Columbus:

5 x Cisco 3620– 2 x Office ports– 2 x Station ports– Ethernet– $7,800 list each


PeachNet Trial InfrastructurePeachNet Trial Infrastructure

Cisco 3640s

Cisco 3620s

Atlanta Toll-Free Dialing


Cisco 3640, 3620Cisco 3640, 3620

Voice interfaces analog only– Telephone– Office (switch)

Future digital T1/PRI, maybe?

Modular, mix & match


Equipment for Trial (addl)Equipment for Trial (addl)

Home offices:– 5 x Cisco 2610– 2 x Station ports– Ethernet– T1 with CSU/DSU– $7,995 list each– Fixed configuration


Use of IP/Voice GatewayUse of IP/Voice Gateway

PeachNet PBX

PBX Phone

IP/PSTN Gateway

Graphics from Selsius & Modified

C3640Ethernet

“Office” port

Analog Voice Circuit

PBX Interior Line - Provisioned for PBX-sourced calls only

~ $8.00 per month


Voice over IP Voice over IP (Long Distance)(Long Distance)

PeachNet

PBX Phone PBXPeachNet

PeachNet

PBX

Augusta

Savannah

PBX Phone

PBX Phone

IP/PSTN Gateway

PBX IP/PSTN Gateway

IP/PSTN Gateway


Atlanta

C3640

C3620

C3620

(706) 721-xxxx

(912) 369-xxxx

(404) xxx-xxxx(770) xxx-xxxx(678) xxx-xxxx

PSTN

x3333

(404) 111-1111

x3000

x2222

x2000

(404) 111-1111


Use of VoIP for Home OfficeUse of VoIP for Home Office

PeachNet

Phone

IP/PSTN Gateway


C2610T1

“Office” port

Analog Voice Circuit

Ethernet

PSTN

“Station” port


AgendaAgenda



Future Trial - Local ServiceFuture Trial - Local Service

Uses special phones– IP/Ethernet telephone– PC with H.323 soft phone

NT server with PBX functionalityIP/PSTN Gateway

– PSTN trunk or standard voice lineTrials later this year with Selsius &

Lucent


IP/PSTN GatewaysIP/PSTN Gateways• PSTN trunk interface• Analog fax/phone/modem

IP/PSTN Gateway

IP PhoneUser InstrumentUser Instrument• Ethernet IP telephone• PC with H.323 softphone• H.323 wireless handsets

Voice over IP (Local Service)Voice over IP (Local Service)

Call ProcessingCall Processing• NT server• PBX functionality

Call Manager


PeachNet

PSTN


Future Integration with VideoFuture Integration with Video

Audio bridge function via MCUH.323


Ultimate Future?Ultimate Future?

StreamingServer 1

Localgateway

PSTN

PBX Phone

Centralgateway

PBX

PSTN Phone

Centralgateway

PSTN

PSTN Localgateway

CPServer 3

AppServer 2

IP PhoneIP Phone

PC PhoneApplication

CPServer 1

AppServer 1

PC PhoneApplication

PC PhoneApplication

IP Phone

CampusNet

RemoteOffice

PeachNet

PeachNet SM & IP Telephony E. Michael Staman Georgia Board of Regents [email protected]...

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