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Session Border Controllers

Session Border Controllers. Managing the Edge Joel Fisher VP Marketing and Business Development Jasomi Networks. Agenda. VoIP Session Border Controllers Key Problems Case Study. VoIP. VoIP used to mean ‘VOICE’ over IP

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Session Border Controllers

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  1. Session Border Controllers Managing the Edge Joel Fisher VP Marketing and Business Development Jasomi Networks

  2. Agenda • VoIP • Session Border Controllers • Key Problems • Case Study

  3. VoIP • VoIP used to mean ‘VOICE’ over IP • VoIP used to imply ‘laying down’ the infrastructure for future killer apps • Now VoIP means • Voice • Video • Presence • Collaboration

  4. Significant Impacts • Transition from wholesale (core) to retail (edge) • Clear protocol winner - SIP • Moving beyond ‘voice’ • Desktop video • 3GPP – multimedia • Introduction of the Session Border Controller • New component to make VoIP work

  5. Session Border Controllers • Back to Back User Agent • Media Proxy • Splits every call into two halves • Can manipulate each have independently to ensure call success • Provides • Security • Service assurance • Legal compliance

  6. SBC Functions

  7. Key Problems • Security • Service assurance • Legal compliance

  8. Problems - Security • DDOS • Encryption • Fraud • Topology hiding • SPIT (Spam over Internet Telephony) • Anti Virus

  9. Problems – Service Assurance • NAT traversal • Firewall traversal • Policy enforcement • Peering • Class of Service • Quality of Service • Interoperability

  10. Problems – Legal Compliance • CALEA / ETSI • Call logging / recording • When will video become part of media capture requirements??

  11. Case Study – Allstream • Telecom carrier based in Canada • Division of Manitoba Telecom Services – Canada’s 3rd largest communications provider • Announced ‘ACS’ – Allstream Collaboration Suite in early March 2005 • Complete hosted collaboration services to SMB market • Email, IM, VoIP, Video conferencing, etc, etc

  12. Case Study - Continued • Offered hosted Microsoft Exchange • With Microsoft LCS (Live Communications Server), now offers IM, VoIP, Video, etc • Customer base is SMB • Customers have variety of firewalls and NAT environments

  13. Jasomi PeerPoint SBC TCP:5061 UDP:10k-15k LCS 2005 HOME Server LCS 2005 Access Proxy Firewall ISA2004 TCP:5061 Radvision IM_First TCP:5061 UDP:10k-15k Radvision MCU Radvision MVP Allstream Network Diagram

  14. Case Study – Main Problems • Maintaining high security standards • Encryption • Protecting the core network infrastructure • Enabling VoIP / Video through NATs and firewalls • Multi-vendor interoperability

  15. Case Study - Solution • Session Border Controller that • Focused on SIP • Far end NAT traversal • Supports Microsoft LCS 2005 • Supports TLS / MTLS • Back to Back User Agent vs. ALG • Result: Successful live deployment!

  16. The Future • More ‘Allstreams’ • Desktop video • Total collaboration • Continued problems • Security • Service Assurance • Combination of standalone SBCs with limited SBC functionality provided by other network elements

  17. Thank You Joel Fisher VP Marketing and Business Development joel@jasomi.com

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