SIP Development: Products and Applications International SIP ’03 Conference, Jan. 16, 2003

1/16/02SIP Products and Apps2 Network Gateway PSTN Phone PVC Managed Services PVC or T1 Web-based Operations Support System Customer Premises Router/ Gateway Look! No PBX! LAN PSTN Phone PBX Redirect Server SIP Server Customer Premises LAN Router SIP Phone THE WORLDCOM CONNECTION SM ARCHITECTURE WorldCom Switchnet WAN U.S. WorldCom Network Voice Mail WorldCom vBNS+ IP Network Firewall QOS Device SIP Phone Firewall QOS Device

1/16/02SIP Products and Apps3 ANIMATED CALL PATH: IP PHONE TO PSTN PHONE Customer Premises PVC or T1 Sip Signaling Voice Path Enterprise Gateway or Router PSTN Phone Network Gateway IP Phone LAN PBX IP Phone LAN Enterprise Gateway or Router PBX PSTN Phone Voice Mail Redirect Server SIP Server WorldCom Switchnet WorldCom vBNS+ IP Network Web-based Operations Support System WAN U.S. WorldCom Network PSTN Phone Firewall QOS Device Firewall QOS Device

1/16/02SIP Products and Apps4 ANIMATED CALL PATH: IP PHONE TO PSTN PHONE Customer Premises PVC or T1 Sip Signaling Voice Path Enterprise Gateway or Router PSTN Phone Network Gateway IP Phone LAN PBX IP Phone LAN Enterprise Gateway or Router PBX PSTN Phone Voice Mail Redirect Server SIP Server WorldCom Switchnet WorldCom vBNS+ IP Network Web-based Operations Support System WAN U.S. WorldCom Network PSTN Phone Firewall QOS Device Firewall QOS Device

1/16/02SIP Products and Apps5 Small Office Example Ethernet Switch Access RouterQoS ApplianceSIP Firewall/NATLocal GWY DSL or T1 to WorldCom PSTN lines to LEC Can be the WorldCom Connection for all services Can be replaced by Virtual Local GWY Optional headsets for softphones SIP phones PSTN Network GWY’s Hosted IP Comm’s

1/16/02SIP Products and Apps6 Medium Office Example Ethernet Switch Access RouterQoS ApplianceSIP Firewall/NATLocal GWY n x T1 to WorldCom PSTN lines to LEC Can be the WorldCom Connection for all services Can be replaced by Virtual Local GWY Optional headsets for softphones PBXEnterprise GWY PBX phones SIP phones PSTN Network GWY’s Hosted IP Comm’s

1/16/02SIP Products and Apps7 DSL Trade-Off Examples for Data and Voice with QoS DSL speed (kb/s) Simultaneous voice calls with G.729 codec Min Data speed* (kb/s) TCP (FTP, , Web) flow control UDP (voice) session counting ToS is signaled to WorldCom IP access to backbone * Additional data bursting when there is less voice

1/16/02SIP Products and Apps8 QoS Appliance Example Snapshot on how well the set policy is performing: –BW in use –BW allocated –BW bursting Adjust bandwidth settings accordingly Courtesy SITARA Networks Note: There is no RFC for managing/policy for UDP and TCP traffic flows.

1/16/02SIP Products and Apps9 Current Customer-Facing Features On-net calls Off-net LD and International Calls Virtual On-Net remote home user appear as a v-net number Forced On-Net 9 or 10 digit PSTN number forced to On-Net VNET Integration available Local/Inbound Calls via Customer-Prem based Local Gateway Non-trusted caller support Calling features Call transfer Call forwarding – unconditional, conditional, on-screening Call Blocking Feature Blocking Find-Me with per-address ring timers Selective Call Acceptance Multiple called aliases Flexible dialing prefixes Call-by-name Internet-integrated Voic /Messaging Mobility Ease of adds, moves, changes Remote Call-In Example: USE-VNET

1/16/02SIP Products and Apps10 Features available on SIP Phone Caller ID Call Waiting Redial List Directory Missed Call List Received Call List Placed Call List Personal Directory Do Not Disturb Anonymous Call Blocking Speaker Phone Call Transfer Mute Headset Multiple Lines 3-way Conferencing Java API Support(Currently Pingtel only) Current client features

1/16/02SIP Products and Apps11 Soft Client in 1Q03 Internal use since early 2002

1/16/02SIP Products and Apps12 Service Configuration Management

1/16/02SIP Products and Apps13 Feature Selection

1/16/02SIP Products and Apps14 Subscriber Account Management

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1/16/02SIP Products and Apps17 Future Plans*  Interoperability: Devices and Services  Network Edge IP Comm. Service Infrastructure  Collaboration  Transport Independence  Global Reach  Single Internet Standard Voice Codec (License-Free) Requires the cooperation of all vendors for gateways, phones, media servers * The opinions presented here may change and may not be those of my company

1/16/02SIP Products and Apps18 Interoperability: The Choices Using SIP PSTN Switch PSTN GWY WorldCom Deltathree Vonage Telia other… Pingtel Snom AG HotSIP Service Providers Vendor Service without public PSTN GWYs Many other SIP phones… Also: w g,b emerging Any to any using the Internet IPTel GPP2 3GPP

1/16/02SIP Products and Apps19 CPE vs. Network Edge Services Customer PremisesCentral Office Access Link(s) Firewall/NAT with UPnP SIP Registrar/Proxy GWY to Local PSTN QoS Utility – replace with MCML PPP* SLA Monitor** Wireless Ethernet Security and AAA Header compression*** Move all IPComm infrastructure functions from the CPE into the network *RFC 2686: The Multi-Class Extension to Multi-Link PPP ** I-D by A. Clark: “RTCP Extensions for Voice over IP Metric Reporting ***RFC 2509: IP Header Compression over PPP

1/16/02SIP Products and Apps20 Bandwidth Savings from Compression (useful for SME using DSL access) CodecVoice kb/s Data Rate with Overhead (kb/s) UncompressedCompressed* G G G Note: Calculated for two voice frames per UDP packet for G.729 * RFC 2508: Casner, S. and V. Jacobson, "Compressing IP/UDP/RTP Headers for Low-Speed Serial Links", 02/1999.

1/16/02SIP Products and Apps21 Perspective on Collaboration SIP based conferencing adds new capabilities in an integrated environment: Only IP network is required, but PSTN/ISDN ports are also supported All media: Text chat, voice, video and data collaboration Integration with applications and data collaboration Support for all modes from scheduled to ad-hoc Presence can complement scheduled conferences Flexible: Choice of user devices: PC/laptop, SIP phone, palm computers Multiple access speeds can be supported Secure collaboration features: Authenticated users Display of attending parties Encrypted media (Legal intercept) Inter-enterprise conferencing requires firewall traversal, Initial services start with voice only, video next, Gradual introduction of new features.

1/16/02SIP Products and Apps22 SIP Conference Services Integration of conferencing with calendaring and scheduling Presence based conferencing Change conference model and media ad-hoc Migrate from IM session to voice call Voice call to audio conference Voice conference to video conference A/V conference to collaboration through document sharing All this without hanging up from the original call/session and while moving around between different end devices! Distant learning – virtual classrooms Advanced web call centers – multimedia with live agent SIP for the hearing disabled is a special conference application

1/16/02SIP Products and Apps23 Streamlining Voice Applications and Components Applications  Announcements  Calling card  Voice mail  IVR  …etc.,..Components  SIP servers  PSTN gateways  Media servers & files  Application servers  AAA servers Ref: A Multi-party Application Framework for SIP Countless ISP voice services and features (more than the 5,000 Class 5 switch) and other services can be decomposed:

1/16/02SIP Products and Apps24 Web Server Application Server AAA Server HTTP SIP HTTP RTP PSTN Media Server File Storage External AAA PSTN Gateway Voice Components (SIP servers not shown)

1/16/02SIP Products and Apps25 SIPPING WG Conference Architecture Application: Conference Focus Factory UA Conference Initiator Conference Focus UA Moderator UA Participant UA Mixing Cloud SIP RTP I-D: A. Johnston, “SIP Call Control – Conferencing for User Agents [Sipping] Focus URI, Focus Factory URI, Conference URI by Eric Burger, on SIP

1/16/02SIP Products and Apps26 Recent Conferencing Internet Drafts A Multi-party Application Framework for SIPdraft-ietf-sipping-cc-framework-01.txt Framework for Conferencing with SIP draft-rosenberg-sipping-conferencing-framework- 00.txt SIP Event Package for Conference Statedraft-ietf-sipping-conference-package-00.txt Conferencing for User Agentsdraft-johnston-sipping-cc-conferencing-00.txt Media Server Control Markup Language and Protocoldraft-vandyke-mscml-00.txt Ref:

1/16/02SIP Products and Apps27 Leverage All Capabilities in Windows Messenger 1. POTS Connectivity PC to phone 2. IP Communications Presence Text messaging (IM) Voice, telephony Video 3. Data Collaboration Whiteboard Application sharing FTP Microsoft Messenger based on SIP Laptop and desktop become full communication enabled Next: Mobility with SIP for mobile devices! Commworks SIP Network Gateway

1/16/02SIP Products and Apps28 CompaqHPCasio Toshiba Siemens Dell Mexmal ASUS Toshiba NEC HP Toshiba * Microsoft Portrait SIP for 2.5-3G & x wireless is quite promising Sony-Ericsson w. HotSIP GUI GUI by SJLabs

1/16/02SIP Products and Apps29 Wireless and Mobility Evolution to 4G  Initial mobile wireless data deployments will be 2.5/3G-based  These are rapidly augmented by IEEE microcellular wireless solutions  The 3G technologies will ultimately replaced by an IEEE 802 mobile broadband wireless solution  Resulting in a tightly integrated IEEE 802/IETF mobile IP wireless data networking infrastructure. Ref: Paul Nikolich, Chairman, IEEE 802 LAN/MAN Std. Com., Boston NGN 2002.

1/16/02SIP Products and Apps30 Objective: Adopt One Single Internet Codec (Internet standards are always better and license free)

1/16/02SIP Products and Apps31 Internet Voice Path: Dallas - Stockholm Better than PSTN voice on the Internet Path traverses 3-4 public networks and 17 IP routers CD quality sound with HotSIP softphone and GIPS codec Consistent quality for over a year of observation Yokohama-Dallas is of similar quality as experienced at the 54 IETF meeting Tested with both WorldCom and HotSIP SIP servers Conclusion: SIP services work well globally on the Internet ‘as is’.

1/16/02SIP Products and Apps32 Global IP Latency and Packet Delivery Stats WorldCom Packet Delivery Statistics (%) Trans Atlantic Europe North America Intra-Japan Trans Pacific

1/16/02SIP Products and Apps33 Global IP Network Map

1/16/02SIP Products and Apps34 Conclusions* SIP based IP communications Interwork well with the PSTN/PBX/Centrex Have most PSTN/PBX/Centrex voice features Beyond voice services that cannot be provided using PSTN/PBX/Centrex Can (and will) replace the PSTN/PBX/Centrex PSTN/PBX/Centrex voice traffic migrates to mobile services and to IP Mobile services migrate to IP and SIP based IP communication End game is all communications move over the Internet * These are strictly personal opinions, though with some mindshare with colleagues