NGNlab. The deployment of an open-source infrastructure

NGNlab. The deployment of an open-source infrastructure

1. International NGN Workshop. 25.11.2009. Bratislava, Slovakia.


Sebastian Schumann

November 25, 2009


  1. 1. International NGN Workshop 25. November 2009 Bratislava, Slovakia

  2. Facts  Next generation communication infrastructure for STU (shared deployment

    of faculties for electronics and informatics)  Playground to implement results of research in the area of IP based services Vision  Open and transparent server and service infrastructure  Cost-efficient investment that offers high-end communication environment An Example  Presenting of how far we went already in the world of standard compliant and free software  Showing that the use of open-source software in education can be tremendously supportive  Shocking operators in what some pieces of hardware can do 2
  3.  Complete SIP based communication infrastructure ◦ Basic SIP services

    (registrar, proxy) ◦ NAT traversal, media relay ◦ Integrated voice mail system, conferencing engine ◦ Media gateway through VoIP trunk ◦ Presence service  We can in fact become a small VoIP operator. 3
  4. 4 OpenSIPS Asterisk MeetMe Mediaproxy mediaproxy SIP RTP RTP SIP

    Virtual Server Module proprietary communication MySQL MySQL MySQL
  5.  Complete IMS service infrastructure ◦ IMS core (P/I/S-CSCF), HSS

    ◦ Integrated presence management ◦ XDMS (ft. authorization, resource lists) ◦ SIP application server  IMS integrated IPTV ◦ Three channels ◦ Network based video recorder (nPVR) ◦ IPTV messaging ◦ Broadcasts 5
  6. Hardware  A small rack  Some servers  Two

    switches  Two UPS 6 Courtesy of ScriS (
  7. Software  0 € 7

  8.  Everything running on the servers is OSS ◦ Operating

    system ◦ Virtualization software ◦ SIP server, media server ◦ IMS core ◦ Application server ◦ IPTV solution  What else do we need? 8
  9.  Asking this question within the Telco environment might provoke

    different answers  Telecommunication infrastructure went through a dramatic change during recent years  Circuit-switched communication vs. packet- switched communication  Move to IP based telephony, software handles calls and features  Service extensions software based 9
  10.  PSTN/ISDN-like features should be replaced, requires well-established products 

    Big operators had/have big partners ◦ Alcatel, Siemens ◦ Ericsson, NEC, Nokia, Motorola, …  Well-established new players ◦ BroadSoft BroadWorks ◦ Microsoft Office Communications Server ◦ Cisco Unified Communications  They all do offer IP based telephony solutions 10
  11.  OpenSER/OpenSIPS/Kamailio SIP AS family ◦ SIP proxy, registrar, redirect

    server ◦ Presence server (UAC, UAS functionality) ◦ Resource list server ◦ Load balancer/LCR server  Asterisk/FreeSWITCH/Yate PBX family ◦ Announcements ◦ Voice mail ◦ Conferencing  SIPPY and other B2BUA implementations ◦ Pre-paid services 11
  12.  OpenIMS and UCT IPTV have a different focus ◦

    Standard compliant implementations ◦ Target for research or advanced services ◦ Early open adoptions of new standards  Software is ideal for research ◦ Working standard compliant base for projects ◦ Each possible modification allowed ◦ Understanding boring theory with hands-on 12
  13.  Is open-source software only for geeks?  Is the

    Telco business too “serious”?  Is OSS not yet mature enough?  Big vendors cannot bankrupt as fast as small companies behind open-source!  Ask Telco's running proprietary vendor software why they will not switch to OSS! 13
  14.  What is the mostly used server OS in your

    company?  Which implementations do your web servers use?  Do you rely on DNS? On open-source DNS implementations?  Have you ever used Firefox to surf the web?  Is your monitoring system using Nagios? 14
  15.  The “internet world” uses open-source software since decades. Is

    the reserve in the “Telco world” solely historic?  Would you say that there will always be a potential separation between low cost/open- source and premium/licensed applications?  Is open-source software less secure due the availability of the source code?  Are the costs for customized vendor applications lower than adapted open-source products? 15
  16.  IP based communication became daily life. Open-source is only

    for small VoIP start-ups though, or?  What if you would have the freedom and independence of choosing the integrator/supporter for your existing systems?  Your points… 16
  17. Sebastian Schumann Disclosure Besides his Ph.D. studies at the

    Slovak University of Technology, Sebastian is working for Slovak Telekom, a.s. in the department of architecture and design. He is an application designer in the area of voice services and converged applications. 17 All registered trademarks are property of their respective owners.