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Packet Voice Business & Technology

Packet Voice Business & Technology. Annapurna South. AHAs !. I was told to add this page ; so I did In the 70’s digital switching was an AHA In the 80’s ISDN was an AHA In the 90’s Internet was an AHA Is packet voice one of the AHA of the 2000’s Why it took that long

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Packet Voice Business & Technology

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  1. Packet VoiceBusiness & Technology Annapurna South Packet Voice

  2. AHAs ! I was told to add this page ; so I did • In the 70’s digital switching was an AHA • In the 80’s ISDN was an AHA • In the 90’s Internet was an AHA • Is packet voice one of the AHA of the 2000’s • Why it took that long • Is it the technology or the business • What in it to make an AHA Packet Voice

  3. The Talk • What is Packet Voice • Drivers • Where $ can be made • Business opportunities • Barriers • Technology behind • Product Examples and Applications • Where we are • Conclusions Packet Voice

  4. What is it . . ? • Media (Transport & Switching) • Use packetized voice instead of regular 64kb/s PCM • Use packet data network instead of TDM circuit switched network • Use packet routing/switching (IP, ATM, MPLS,..) instead of circuit switching (DMS or 5ESS) • Control (call control) • Control call setup within packet network • Guarantee QoS that is not naturally available • Use Internet-style distributed control engines {e.g. softswitch} instead of centralized vertically-integrated circuit switches • Use standard open protocol {SIP, MGCP,..} • Applications (features) • Subscriber management, value-added, OAM&P • Create new value-added features leveraging packet nature Packet Voice

  5. Access Packet Network Core Packet Network SS7 Packet Voice Network Architecture (vision) Feature Servers IP phone Feature Servers Call Agent (softswitch) Call Agent (softswitch) Enterprise Packet Network Premise Router Network Edge Gateway Signaling GW Would it ever be that ; when, . . In the mean time . . . Packet Voice

  6. Access Network Core Packet Network PSTN SS7 Voice Network Architecture: Now and near future (PSTN/NGN) SIP phone Feature Servers Call Agent (softswitch) Call Signaling: MGCP, H.248 Bearer Management: MGCP, H.248 MGCP, H.248, SIP Premise Gateway Network Edge Gateway PBX/KTS T1 CAS ISDN PRI Router Trunk GW GR-303 ISDN PRI IP-PBX Signaling GW Class 5 Class 3/4 One example Heterogeneous Network Packet Voice

  7. Puzz words • VoIP: Voice over IP • VoATM: Voice over ATM • AAL2: ATM adaptation layer #2 used heavily for compressed voice transport • SGW: Signaling gateway • MGW: Media gateway • TGW: Trunk gateway • IAD: Integrated access device • SS7: Signaling system #7 • Codec G.711. G.726, G.729, G.723 • NGN: Next Generation Network (packet voice network) • Softswitch, call agent, call control • Did you have enough ???? Packet Voice

  8. Drivers for Packet voice • Mainly 2 Big vendors for major circuit switching equipment in NA (monopoly) • Circuit switches are vertically integrated & becoming too big ;expensive to maintain and to add features to • Two networks: expensive to maintain & evolve • Voice makes the $ Data takes the bandwidth • Technology availability (or about) • Voice market is still there and growing • Packet voice promised: • Break down centralized architecture allowing competition • Bandwidth saving where it is expensive • Use of one unified network ; reducing cost • Leverage un-used capacity in existing packet data network • Lower cost technology • Offer newer features not easily available with circuit switching Competition Lower cost Revenue + Packet Voice

  9. Where can $ be made • Service Providers • Offer same service with a lower cost • Generating new revenue from new features • Equipment vendor • Legacy equipment replacement • Mediation opportunities in the heterogeneous network • Development of new features • Best where Packet voice has a generic advantage: • Where bandwidth is scarce • Network is growing & expensive • Operating cost is expensive •  Core, Switching, Access, Enterprise Packet Voice

  10. Business Opportunity Example 1Toll Bypass Core Packet Network PSTN PSTN SS7 • Trunk gateway • Opportunity: Lower cost alternative for expensive long distance telephony trunks. • Sell to long distance carrier for Class 4 (Tandem) Bypass in the Backbone network • More attractive forOverseas trunks • Relies on PSTN (Class5) for network access • Can offer low cost tie lines for Enterprise Private network using PBX (entry strategy !!)  create a short term opportunity • Pure cost reduction (bandwidth reduction) • Possible newer feature for additional revenue • Current alternative have been around & capital has been depreciated. • There may be a low quality perception for end users Trunk GW Signaling GW Trunk GW Packet Voice

  11. Example 1 (cont.) • Transport facilities are in existence • gateway for PSTN-packet network interworking (for media & Signaling) • Technological issues • Speech coding & Silence suppression • Echo cancellation • Signaling interworking (IP to SS7) • ATM vs. IP Packet Voice

  12. Business Opportunity Example 2 Softswitch “A Softswitch is software utilizing open standards which can perform distributed communications functions on an open computing platform.” Opportunity: A technology and a network architecture that enables entery into a BIG market that was a monopoly to offer a reduced cost, feature rich alternative to customers with low capital investment Packet Voice

  13. Example 2 (cont.) Packet Voice

  14. Business Opportunity Example 3Packet in the Access (VoDSL) • CLEC Packet Access market for SME end users • CLEC lease unbundled loops to access SME from ILEC. • End user need for multiple voice connection. • Existing loop is practically the means for most most SME access. T1 is expensive and may be more than needed. • Service provider opportunity: avoid leasing T1 from ILECs. Lease unbundled loop and a CoLo. • Equipment vendor opportunity: IAD, GR303 gateway Access Network PSTN D SLAM GR303 gateway IAD Packet Voice

  15. Business Opportunity Example 4Packet in the Enterprise • IP-PBX • Enterprise or campus application • Integrated voice & data & video • QoS enabled network • Voice is all packet • Connection to PSTN • Multi-site private network • Usually very feature-rich PSTN Packet Voice

  16. Business Opportunity Example 5Packet in the Access (VoDSL) • CLEC Packet Access market for SME end users • CLEC lease unbundled loops to access SME from ILEC. • End user need for voice & data. • Existing loop is practically the means for most most SME access • How many phone extensions & PC connections can we jam on one loop • Service provider opportunity: Bundled voice & data package • Equipment vendor opportunity: IAD, GR303 gateway Access Network PSTN D SLAM GR303 gateway IAD Same as #3 but with voice & Data IP phone Packet Voice

  17. Business Opportunity Example 6 Voice features Telephone feature market was a monopoly for switch vendors only. Switches are vertically integrated and feature implementation was proprietary. Opportunity: By enabling NGN network architecture, feature development is opened for new entrant. Reproducing existing telephony features and creating new features are available. Required capital investment is not prohibitive. This opportunity is piggybacked on the network architecture being enabled. It is encouraged by the customer for enhance competitiveness. Packet Voice

  18. Other Opportunities • Opportunities enabled by new network architecture: • Voice gateways (Consumer market) • 3rd gen DSLAM (Carrier market) • IP/ SIP Phone • Piggyback on other business initiatives • Community of vendors • Standard committees help Packet Voice

  19. Up-the-hill barriers • Network reliability (Bell heads vs. Net heads) • Availability (Fault tolerance, down time/yr, Redundancy) • Scalability • Voice quality • Reality, Perception • Matching Legacy technology (PSTN) features • ??? (911, wire taping,..), centrex features • Lack of mature OAM&P • Resistance from legacy product equipment vendor • Interworking with Legacy PSTN Packet Voice

  20. What new Technology • Packetizing voice • Speech coding • Echo cancellation • Silence suppression • Voice quality measurements • Packet network with high performance • Packet loss • Delay • Jitter • Multi-media networks and Network equipments • QoS Packet Voice

  21. Some techi Jargon • Packet voice sent as compressed or uncompressed voice frames of few to 10’s msec long. Silence may not be sent. • Quality degradation due to packet loss (few %), latency (>100msec noticeable) & jitter (>10msec eats away from latency) • On the DSP • Implement echo canceller since delay is high enough • Implement jitter buffer • Implement packet loss replacement • On the Network • Implement QoS • Reserve bandwidth (circuit emulation !!) Packet Voice

  22. Some techi Jargon • Voice Packets Sent over a connection-oriented (ATM, APLS) or connectionless (IP, Ethernet) networks • Voice over IP • RTP/UDP/IP  high overhead unless multiplex. • Voice over ATM • AAL1 CBR (circuit emulation) • AAL2 RT-VBR : highly efficient • With payload, send time stamp, sequence no., ID,.. • Two ends negotiate resources (codec, SS, ..) • Voice packet are typically small 100 octets or so • Signaling is similar to Q.931 (used in PSTN) • Voice over DSL • Use DSL bandwidth to send multiple derived voice channels over DSL link • Typically voice integrated with data Packet Voice

  23. Packet Voice in the Access Data network ISP Data services Platform QoS Enabled Edge Switch Internet E-commerce Access Network MGW GR303 ISDN PRI L O O P PSTN CL5 switch M U X Packet IAD End User Enterprise PSTN Gateway Multi Service provider Core Networks CAS CL3/4 switch Data CPE TGW Voice Next Gen (packet) Network TDM IAD Media Gateway SGW Call Agent Packet Voice

  24. Access Flavors and migration TDM link Class 5 Packet IAD Packet voice Packet media TDM link Bit signaling Bit signaling TDM link TDM IAD Or PBX TDM voice IP ATM Bit signaling Soft switch TDM Mediation IP Customer media Gateway IP Packet voice IP MGCP signaling IP IP (SIP) Phone Packet Voice

  25. IAD Telephone • Network uplink • ATM-sDSL, Frame R-sDSL • ATM-T1 & Ethernet 10/100BT ports Analog DSX1 SIP Fax PBX I SIP Phone Router • analog voice ports • (POTS / FXS / centrex) • GR303, CAS to PSTN • MGCP to NGN Media gateway is Similar Communicates with a softswitch Not with a GR303 gateway • digital voice port • CAS, ISDN PRI to PSTN • MGCP to NGN Packet Voice

  26. Packet Voice Service Provider Market Total WW Public Packetized Basic and Value-add Revenues ($ billion) Packet Voice (Source: Dataquest, March 2000)

  27. What is packet voice ? • Unmatched Performer (U.P.) • Obvious Updates to Technology (O.U.T.) • Disruptive Upstart (D.U.) • Disruptive Innovator (D.I.) Disruptive DU Legacy=PSTN UP OUT DI Performance Time Packet Voice

  28. Don’t believe will ever eliminate TDM/PSTN Packet Voice is disruptive To TDM circuit switching Commercial Phase Didn’t cross the casim Not yet into volume • Why it took that long • Is it the technology or the business • What in it to make an AHA It is in Commercial Phase Didn’t cross the chasm yet Lots of $$ behind It is a whole network evolution ; implemented in parts Packet Voice

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