pc-to-pc call RRS feed

  • Question

  • We are just finalizing test of a hosted OCS setup (HMC deployment guide), and everything works, just not anything related to SIP tunnelling between external clients. Our configuration is as follows:

    - 1 backend (CD,QoE, SQL)
    - 1 application (OCS roles)
    - 1 frontend (Edge, two nics)

    Published with a Cisco PIX 515 firewall and Squirt for reverse proxy. We can chat, expand groups, see ABS, do live meeting (w/wo video, voice), share desktop, everything works - just not two features: pc-to-pc call and send file. Pc-to-pc call only works if they are on the same side of an external line (SIP not traversing firewal), but if one of the MOC users are behind another ADSL (router) - we cannot get voice to connect. I guess is has something to do with media relay or SIP/TURN/STUN. I even tried putting the external MOCs on a WAN connection with not firewall, but does not work.

    Where do I start looking. I used a Network Monitor but my MOC clients only do TURN and TCP protocols - no SIP/STUN.

    Any clues?

    Monday, October 12, 2009 8:13 AM


All replies

  • First of all your naming of OCS roles in incorrect

    1 Backend (this is your SQL)
    1 Front-End (this is your pool)
    1 EDGE Server (this is your DMZ server)

    You can read this whitepaper on designing the OCS DMZ Server

    Are you using OCS 2007? or OCS 2007 R2?
    OCS 2007 requires a public IP Address!
    - Belgian Unified Communications Community : http://www.pro-exchange.be -
    Monday, October 12, 2009 10:02 AM
  • Hi - thank you for the clarification.

    We are running Windows 2003 R2 64bit, with OCS 2007 R2 (due to support for NAT). I got a hint to see about routing between the internal interface and external interface on the EDGE, but I cannot see how routing should be configured to solve this matter.

    I will read the whitepaper as there maybe some solvements here, but we did follow the HMC deployment step by step, I do believe this is a strange matter.
    Monday, October 12, 2009 10:12 AM
  • You can find some additional details on the communications process in this blog article:
    Jeff Schertz, PointBridge | MVP | MCITP: Enterprise Messaging | MCTS: OCS
    Monday, October 12, 2009 10:55 AM
  • Hi
    Any update for your issue?

    Monday, October 19, 2009 6:44 AM