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No access to dedicated LD services.Served by T1 frame relay circuit dropped from microwave tower on same mountaintop.OPX Replacement - Local Remotes $Rate changes creating advantageous climateT1 @$300/mo.DSL over 4-wire LADs @$48/mo., but possibly going to $200/mo. OPX @$31.50/mo., but possibly going to $84/mo.In use at staff homes Contemplated for other off campus offices6+{A+{At4C&VoIP to replace OPX is simple because:''$"Usually no DID (although fairly simple with E&M tie trunk interfaces)No need for complex call accountingNo or simple voicemail requirementsSimple PBX translationsVoice bandwidth requirements minimalVoIP in the OUS Tandem Network(1ChallengingInterestingCost Effective (probably)4The Oregon University System voice network connects:54(3 semi-large universities:UO, OSU, PSUAll in the Willamette Valley4 small regional universities:WOU, SOU, EOU, OITGeographically remoteOHSU - Public corporation in Portland`*)&*)&,'OUS ETN history and culture$h1988 - Contract with AT&T8 PBXs - Sys 85-G2-G3Dorm phones for LD resaleCopper and multimode fiber backbonesVoicemail - Audix - IntuityETN network and NOC1992 - H.320 video and MCU1998 - Y2K upgrades to G3, Intuity, misc. systemsIntelcom Committee sets policyEquivalent systems across OUS, with exceptionsFunding model subsidizes regional universities^tU J tOUS ETN consists of:$wMultiple ISDN-PRI hubbed to OSUAT&T SDN long distance from large universities w/ small schools using OSU SDNVideo MCU at OSU - multipoint H.320 video or voice and w/ upgrade H.323 gateway and multipointShared CMS - ACD and trunking management statisticsFault reporting - receives system alarms, filters based on severity, and pages support staffNOC staffCall accountingxw>h 6 -(ETN features:$+5-digit dialing between campuses - shared # planDCS - passes name info, answer and disconnect supervisionSDN access for regional universitiesNetworked voicemail - name, # in message headerTEHO - Tail end hop off in each metro areaH.320 video between schools and to MCUReliability and stability,,Forces of Change:$Cost FactorsLong point-to-point T1s to EOU, SOU, OIT384K H.320 video and voice traffic forced T1 #2Opportunity factorsAvailable OWEN bandwidth in backboneSDN rates droppingLD market competitionTechnological advancesCompression - ReliabilityFeatures (signalling) - StandardsYN=XN=   ETN Replacement Options:$ISDN-PRI SDN - Add SDN to regional schools and use it for LD, TEHO and (with QSIG) for all ETN functionsVoIP to some or all schools w/ or w/o QSIG, depanding on vendor solutionHybrid Solution - VoIP in the Valley, ETN or SDN in the hinterlands>i' %-HMajor Assumption: All existing features will be maintained or improved   Challenges $Bandwidth limited on frame circuits to regional universitiesAt cheap frame price may be worth adding frame circuits just for voice except& US West CIR unreliableSupport for DCS signaling just emergingCisco to support some sort of signalling soonLucent proprietary solution to packetize signaling information over IP network whether voice is IP or ETN x=f(<e', $ D! Other Issues$-Call accounting - on-net/off-net pricing based on PBX trunk group, so not a problemVideo supportH.320 much easier with ETN network than SDN or 700 number option for schools without PRI trunkingMove to H.323 will help but H.320 still growingVoice Quality - difference is noticeable, but meaningful?<b:b:"Other Issues (cont.)$ControlTelecom is sole owner and user of ETN network (except for AT&T, US West, GTE, and PTI, of course)Using OWEN introduces many more interested parties and we would, for now, be the only isochronous app.SOEN/state politics - network ownership is a political issue which goes outside of higher ed. Complexity - more hardware, more protocols, more people, multiple alarm platforms?" dd@,|?" dd@   " @ ` n?" dd@   @@``@n?" dd@  @@``PR    @ ` ` p>> @( fNp0Hם0> @ @ 6x P  xT Click to edit Master title style! ! @ 0tx  xRClick to edit Master text stylesSecond levelThird levelFourth levelFifth level!   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