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Lync 2010 Dial-in Conferecing RRS feed

  • Question

  • I have currently a customer who only wants to deploy the A/V conference and dial-in conference facility for Lync. I have the following questions:

    - For their dial-in conference they have a Ericsson BP-250 and Ericsson MD-110. I see that they are part of the supported devices but will a direct SIP connection not be enough for their dial-in conference functionality?

    - Furthermore they have no local internet breakout method at their site and have to breakout at their Head office which is situated in a different country (WAN connection is 2Mbps MPLS connection). Is it even worthwhile for them to consider external access if all of the A/V and web conference traffic has to traverse a WAN link and so far from the source?

    Thursday, July 5, 2012 8:49 AM

Answers

  • Hi, first you need to calculate how much user and how much conferences you will have on the Lync conference server. It is possible to install the conference servicese seperate in your main office with the internet breakout or you will intsall a seperate internet breakout for the Lync server in the other office.

    For the dial-in conferences you need a connection to your local PBX. It could be a SIP Trunk if your PBX support Lync or you use a media gateway from Audiocodes, NET, Ferrari or other supported GW with a ISDN E1/T1 connection to your PBX.

    If you have only a 2Mbps MPLS you have to decide in which side you will install the conferencing server.


    regards Holger Technical Specialist UC


    • Edited by Holger Bunkradt Thursday, July 5, 2012 10:10 AM
    • Proposed as answer by Kent-Huang Thursday, July 12, 2012 7:03 AM
    • Marked as answer by Kent-Huang Friday, August 3, 2012 6:46 AM
    Thursday, July 5, 2012 10:08 AM

All replies

  • Hi, first you need to calculate how much user and how much conferences you will have on the Lync conference server. It is possible to install the conference servicese seperate in your main office with the internet breakout or you will intsall a seperate internet breakout for the Lync server in the other office.

    For the dial-in conferences you need a connection to your local PBX. It could be a SIP Trunk if your PBX support Lync or you use a media gateway from Audiocodes, NET, Ferrari or other supported GW with a ISDN E1/T1 connection to your PBX.

    If you have only a 2Mbps MPLS you have to decide in which side you will install the conferencing server.


    regards Holger Technical Specialist UC


    • Edited by Holger Bunkradt Thursday, July 5, 2012 10:10 AM
    • Proposed as answer by Kent-Huang Thursday, July 12, 2012 7:03 AM
    • Marked as answer by Kent-Huang Friday, August 3, 2012 6:46 AM
    Thursday, July 5, 2012 10:08 AM
  • For the dial-in conferences you need a connection to your local PBX. It could be a SIP Trunk if your PBX support Lync or you use a media gateway from Audiocodes, NET, Ferrari or other supported GW with a ISDN E1/T1 connection to your PBX.

    Thanks for the reply. I have talked to the PBX guy and he said he can provide me with a SIP connection from his IP-PBX. Will that still necessitated a gateway device as I believe the PBX is going to use some from of a Gatekeeper Card which is connected to he LAN for this? Will Lync understand a SIP connection to the mediation server from the IP-PBX gateway card - as I understand a gateway is normally needed if it is a non IP-PBX or TDM-PBX only?

    As for the Internet breakout I cannot use a local Internet breakout of any from. We will have to use the Internet Breakout which is situated across the MPLS link but it does not make any sense for a local external user to connect like this as it will most properly effect the A/V and web conferencing end-user experience. They going to have most likely not more than 5-10 A/V and web conferencing clients active at a time. They want to use the Lync A/V and web conferencing features between their local headoffice and local branches. The external access would be then for the staff that currently do not have direct access to the office.

    Thursday, July 5, 2012 11:38 AM
  • Since the IP-PBX is not certified you will still need a gateway of some type.
    Thursday, July 5, 2012 12:57 PM
  • Hm, for lync you need a SIP Trunk which is certified. The SIP trunk should support TCP, sip refer and ohter things. It will work with a Aastra Mxon 4.01 a MD110 or BP250 will not support this SIP Trunk. You have to use a small Gateway with a E1/T1 ISDN or Baserate Interface.

    If you will have a conference with only 5 Poeple without Video you can use your MPLS. Pleas look at this Link for the bandwidth using.

    http://designinglync.blogspot.de/2011/05/lync-bandwidth-requirements.html


    regards Holger Technical Specialist UC

    Thursday, July 5, 2012 1:14 PM
  • Aha - just to clarify this will not be a SIP Trunk but a Direct SIP connection. The PBX and Lync server is on the same network. My understanding always was that SIP Trunks are from SIP Internet Service Providers?

    Thanks for the link - will have a look at it later on as it is blocked here at work.

    Thursday, July 5, 2012 1:43 PM
  • For me it is no different between a internal or external SIP trunk, because also from a PBX it is called SIP trunk. I'm sure the Businessphone and also the MD110 up to the latest version does not support a SIP connection for Lync.

    regards Holger Technical Specialist UC

    Thursday, July 5, 2012 2:08 PM