From AIN to CTI to Vo IP to

From AIN to CTI to Vo. IP to IPTEL yet another Internet service henry. sinnreich@mci. com Henry Sinnreich, MCIwith pure black and white with frames For the associated text, please print out as notes pages

Rise of the Dumb Netwok IP services Key network protocols • DNS • DIAMETER AAA & ROAMOPS • ftp • SIP call setup & security • Mail - w. a/v integration • Web • RTP/RTCP media transport • RTSP media server control • RSVP + backbone Qo. S/DS • IP telephony * • RTF/MC PPP for slow links • A/V on demand • L 3 IPSEC security • A/V/data conferencing • L 2 TP tunneling, MPLS VC’s • VPN - extranets • SNMP • IP multicast • Resource location • . . . many other not yet invented… * so what’s the big deal ? 9/25/2020 Henry Sinnreich, MCI Buying decisions are data/IP driven 2

From AIN to IPTEL to Web-Media Value=Features/Cost (complexity) et k r a m ed Today: n i b m co + Vo. IP B 0 $60 Call H. 323: Centers ISDN on Telecom IP/LAN AIN: computers in center SCE CTI: TDM+LAN some IP many API’s + RTP MS TAPI 1990 9/25/2020 Henry Sinnreich, MCI IPTEL: Internet Protocols Open WWW Evolution of • network • protocols • applications Time 2000 3

Use the Web & Simplicity: SIP and SDP Address in header = URL • URL addressing any network sip: 766 -1223 (phone) sip: 766 -1449 (fax) sip: cnn. news. com any device http: //operator@mci. com Encryption: PGP, v. 2. 6. 2 Description in body = SDP • HTTP syntax • Security • Session Description service=ISDN mobility=fixed language=en m=audio 12345 RTP/AVP 0 …. . . One message Complete data for network sip: 1 -972 -498 -1223@mycarrier. com 9/25/2020 Henry Sinnreich, MCI for people 4

SIP Call Model w. Redirect & Mobility Basic SIP call setup is 1. 5 RTT SIP Server INVITE jeff@isp. net 1 Caller Agent Caller Client 9/25/2020 2 User Location Service Location 302 Temporarily Moved Location: sip: visitor@marketing. isp. net 3 INVITE visitor@marketing. isp. com 4 200 OK Henry Sinnreich, MCI Called Agent visitor Called Client Jeff 5

PSTN-Internet (PINT) PINT CLIENT SERVER WWW/IP NETWORK Request to Call Request to Fax PSTN or PBX C->S: INVITE marketing@pint. mailorder. com SIP/2. 0 Via: SIP/2. 0/UDP 169. 130. 12. 5 From: anon-1827631872@chinet. com To: 1 -800 -IRON-YES Call-ID: 19971205 T 235405. 56. 78@chinet. com Subject: Sale of Ironing Boards Content-type: application/sdp Content-length: … Request to Hear Content 9/25/2020 SCP/IN v=0 o=- 53655765 2353687637 IN IP 4 128. 3. 4. 5 I=Ironing Board Promotion c= TN RFCxxxx +1 -201 -406 -4090 m=audio 0 voice Henry Sinnreich, MCI 6

SS 7 for IPTel Add addresses for IPTel routing • DB interface • Translate into SIP • IP interface ng. IN PC call/conference to PSTN/CCS#7 end point DB GWY SS#7 Overseas switch net IP network GWY • Internet • MCI private Inbound PC call 9/25/2020 SS#7 Outbound Henry Sinnreich, MCI GWY US switch net • Destination E. 164 • Origination E. 164, CLI • Time stamps • Call ID • Call treatment • Other. . . 7

Interoperable IP Telephony Gateways GWY Protocols ? • ISO/IEC DSM-CC AIN/IN NCP User-Network Protocol • NOTASIP SS 7 TCAP SS 7 SIGNALING GATEWAY ISUP Nothing Other Than A Simple Internet Phone • SGCP ? Simple Gateway Control Protocol • RSGP GATEWAY CONTROL inter GWY ? IMT MEDIA GATEWAY VOICE, FAX, DATA 9/25/2020 RTP Reliable Signaling Gateway Ctrl. Prot. ? INTERNET PSTN ? • DIAMETER series Twice RADIUS • IPDC series Six IP Device Control Protocols • Etheric • DTR/TIPHON 020004 • SIP with PIP extensions Henry Sinnreich, MCI 8

SIP Interaction with SS 7 - ISUP INVITE CENTRAL OFFICE IP telephony gateway IAM SIP ISUP 100 ACM ANM 200 ACK connect ack conversation BYE REL RLC 200 9/25/2020 Henry Sinnreich, MCI 9

Audio/Video mail integration with RTSP and SIP and e-mail for call centers Send personal information to customers 1. INVITE A/V CLIENT 2. LOCATION RT SP 4. VOICE MENU and RECORD a/v MSG Interactive voice response (IVR) 9/25/2020 SIP 5. e-mail URL SERVER MAIL CLIENT 3. Setup RECORD & PLAY MEDIA 6. A/V MSG STREAM MEDIA SERVER RTSP PLAYER Henry Sinnreich, MCI 10

IP Based Web Call Center Data Operator 3 Customer 2 1 MCI Web Server Same IP transport for voice and data Don’t buy boxes for their software “Software virtual” : • Switch • ACD • IVR no CTI Present: Boxes from ~15 vendors and counting Replace with one software package ? 9/25/2020 Henry Sinnreich, MCI 11

SIP/IP Call Center Components Data Operator Agent Parking Voice Understanding Customer 9/25/2020 Operators Operator groups Operator Client Sound Graphics Video ACD Function Multimedia “IVR” MCI Web Server Henry Sinnreich, MCI Web content MCI service Generic Software 12

ng. IN Virtual Private Network - Extranet • Authentication • Routing • Qo. S • Transactions DIAMETER AAA: • Authentication • Authorization • Accounting Roaming Operations PSTN Intranet Iptel Gwy Security Gwy Credit verification & payments Internet encrypted tunnels Security Gwy Intranet Tunneling protocols: • IPSEC • L 2 TP, MPLS 9/25/2020 Henry Sinnreich, MCI 13

Conclusion: Why keep telephony separate on the Internet? Make ISP=ITSP (Technology & future cannot be predicted) Will telephony be absorbed as yet another Internet service ? In what time ? • Smoothest introduction in IP networks • Extra revenue possible from: • gateway services to PSTN • Qo. S • portfolio of convenient & rich IP services Please see references 9/25/2020 Henry Sinnreich, MCI 14

References - 1 Very large conferences on the Internet: The Internet Multimedia Conferencing Architecture” by M. Handley, , J. Crowcroft, C. Bormann, J. Ott http: //north. east. isi. edu/~mjh/papers. html The home page of the IPTEL IETF Working Group: http: //www. bell-labs. com/mailinglists/iptel/ Integrated Services in the Internet Architecture: an Overview by Braden, Clark, and Shenker, RFC-1633, June 1994. ftp: //ftp. isi. edu/in-notes/rfc 1633. txt “Security Architecture for the Internet Protocol” by Stephen Kent and Randall Atkinson, IETF draft, March 1998, ftp: //ftp. ietf. org/internet-drafts/draft-ietf-ipsec-arch-sec-04. txt Information page for the The Session Initiation Protocol (SIP): http: //www. cs. columbia. edu/~hgs/sip/ The Real Time Streaming Protocol (RTSP), Proposed RFC 2326, ftp: //ftp. isi. edu/innotes/rfc 2326. txt Papers on the Real Time Protocol (RTP): http: //www. cs. columbia. edu/~hgs/rtp/papers. html INRIA - High Quality Audio Over The Internet, the Free Phone, http: //www. inria. fr/rodeo/fphone/ Internet Telephony and Multimedia Services http: //www. cs. columbia. edu/~hgs/research/imm/ 9/25/2020 Henry Sinnreich, MCI 15

References - 2 IETF Session Initiation Protocol by Henning Schulzrinne, presentation at the VON Spring ’ 98 Conference, http: //www. pulver. com The PINT Profile of SIP and SDP by S. Petrack ans Lawrence Conroy, IETF draft, August 1998, ftp: //ietf. org/internet-drafts/draft-ietf-pint-sip-00. txt Call Processing Language. Requirements by J. Lennox and H. Schulzrinne, IETF Draft, August 1998, http: //ietf. org/internet-drafts/draft-ietf-iptel-cpl-requirements-00. txt The home page of the PINT IETF Working Group: http: //www. bell-labs. com/mailinglists/pint/ MIT distribution page for PGPfone: http: //web. mit. edu/network/pgpfone/ Providing integrated services over low-bitrate links by Carsten Borman, IETF draft, March 1998. ftp: //ftp. ietf. org/internet-drafts/draft-ietf-issll-isslow-04. txt The Multi-Class Extension to Multi-Link PPP by Carsten Borman, IETF draft, March 1998. ftp: //ftp. ietf. org/internet-drafts/draft-ietf-issll-isslow-mcml-04. txt Compressing IP/UDP/RTP Headers for Low-Speed Serial Links by S. Casner and V. Jacobson, IETF draft, July 1998, http: //ietf. org/internet-drafts/draft-ietf-avt-crtp-05. txt URLs for Telephony by A. Vaha-Sipila, IETF draft, February 1998. http: //www. ietf. org/internet-drafts/draft-antti-telephony-url-06. txt An RTP Payload Format for User Multiplexing by H. Schulzrinne and J. Rosenberg, IETF draft, May 6, 1998. ftp: //ftp. ietf. org/internet-drafts/draft-ietf-avt-aggregation-00. txt 9/25/2020 Henry Sinnreich, MCI 16

Relevant IETF WG’s and mailing lists MMUSIC: confctrl@ISI. EDU IPTEL: iptel@lists. research. bell-labs. com PINT: pint@lists. research. bell-labs. com SS 7: ss 7 -internet@Bay. Networks. COM to subscribe To: iptel-request@lists. research. bell-labs. com Message body: subscribe 9/25/2020 Henry Sinnreich, MCI 17