Jonathan Lennox
323 Fourth St. #2
Jersey City, NJ 07302
Tel: 201-239-9248  Email: lennox@cs.columbia.edu

EDUCATION
Columbia University, New York, NY
  Ph.D. Computer Science, February 2004
      Advisor: Henning Schulzrinne
      Dissertation: Services for Internet Telephony
  M.Phil. Computer Science, May 2000
  M.S. Computer Science, February 1996  GPA: 4.083 / 4.333
  B.A. Mathematics, May 1994      GPA: 3.937 / 4.333  Major GPA: 4.126 / 4.333
                                  (Summa Cum Laude, Phi Beta Kappa) 

PROFESSIONAL EXPERIENCE
Bell Laboratories -- Research Intern  Holmdel, NJ, Summer 1998 -- Summer 2001
  Developed a SIP and RTP-based end point for an experimental advanced mobile
  switching center (MSC) architecture.  Architected and implemented an
  embedded RTP stack and a C++/CORBA-based SIP endpoint.

  Designed, developed, and analyzed procedures to efficiently integrate a SIP
  and RTP-based mobile switching center with existing mobile networks.

  Designed and developed a SIP registration presence integrating a SIP proxy
  server with a Home Location Register.

ACADEMIC AND PROJECT EXPERIENCE
Columbia University -- Post-Doctoral Researcher     2004 -- present
Columbia University -- Graduate Research Assistant  1994 -- 2004
  Design and implementation lead of CINEMA, Internet Telephony server for SIP.
    Created, designed, and implemented the SIP Common Gateway Interface and
    the Call Processing Language.
    Designed and implemented the proxying, policy, build system, and
    event-state architecture.
    Measured performance and evaluated throughput.
  Designed and developed a system for sharing applications among computers.
  Created RTPLib++, a C++-based library for the Real-time Transport Protocol.
  Analyzed and categorized feature interactions in Internet telephony.

TEACHING EXPERIENCE
Columbia University, Department of Computer Science
  Taught:
    Programming Languages: Java                  Spring 1998
  Teaching Assistant:
    Topics in Computer Science: Cryptography     Fall 1995
    Artificial Intelligence                      Spring 1995
    Analysis of Algorithms                       Fall 1993 & Fall 1994

OTHER EXPERIENCE
Columbia University, Engineering Development and Alumni Relations -- Web
     Designer, 1996 - 1997
  Designed and adapted alumni magazine for web presentation.

SKILLS
Programming Languages
  C, C++, Java, Perl, SQL, PHP, Tcl/Tk, Unix shell, Common Lisp, Scheme,
  Pascal
Internet Protocol Knowledge
  VoIP/IP Telephony: RTP/RTCP, SIP, H.323, SDP, SAP, RTSP, SIP-CGI (Author), 
                     CPL (Author)
  General: TCP/IP, UDP, SNMP, RPC, CORBA, HTTP, CGI, SMTP, TFTP, NFS, XML
System Knowledge
  Pthreads, Unix system and shell programming, Unix system administration
Operating System Experience
  Solaris, Linux, FreeBSD, Mac OS, Mac OS X, Tru64, SunOS 4, Ultrix, Windows
Tools
  Perl, Tcl/Tk, TeX, LaTeX, Lex, Yacc, CVS, RCS, Make, Sed, Awk, gdb, M4,
  Autoconf, Automake

SELECTED PUBLICATIONS
J. Lennox.  Services for Internet Telephony.  Doctoral Dissertation.
January 2004.

J. Lennox and H. Schulzrinne.  A Protocol For Reliable Decentralized
Conferencing.  ACM International Workshop on Network and Operating Systems
Support for Digital Audio and Video (NOSSDAV), Monterrey, California, June
2003.

J. Lennox and H. Schulzrinne.  CPL: A Language for User Control of Internet
Telephony Services.  Internet Engineering Task Force.  To appear as Request
For Comments (Proposed Standard); blocked on unfinished normative reference.
January 2002.

J. Lennox, K. Murakami, M. Karaul, and T. F. La Porta.  Interworking
Internet Telephony and Wireless Telecommunications Networks.  Computer
Communications Review, October 2001, Vol 31, No. 5, pp. 25-36.

J. Lennox, J. Rosenberg, and H. Schulzrinne.  Common Gateway Interface for
SIP.  Internet Engineering Task Force, Request for Comments 3050
(Informational), January 2001.

J. Lennox and H. Schulzrinne. Call Processing Language Framework and
Reqirements. Internet Engineering Task Force, Request for Comments 2824
(Informational), May 2000.

J. Lennox and H. Schulzrinne.  Feature Interaction in Internet Telephony.
Sixth Feature Interaction Workshop, Edinburgh, Scotland, May 2000.

J. Lennox, H. Schulzrinne, and T. F. La Porta.  Implementing Intelligent
Network Services with the Session Initiation Protocol. Columbia University
Computer Science Technical Report CUCS-002-99, January 1999.

CITIZENSHIP
United States of America