Placement of CTMS

Unanswered Question
Mar 4th, 2010

Hi,

We have two locations lets say A & B, for which the end-to-end delay is about 150 ms. If A has two endpoints (say A1, A2) and in B another two (B1, B2), and if we were to try a multipoint call between  3 of the endpoints, it seems that it is not possible to achive the recommended end-to-end latency of <200ms for all the call legs of the multipoint call, since

If the CTMS is placed at site B,  then A1 to A2  latency will be 150+10+150

if the CTMS is placed at site A,  then B1 to B2 latency will be 150+10+150

Is there a solution for this ?

Thanks

I have this problem too.
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gogasca Fri, 03/05/2010 - 13:50

For MP meetings the latency measured by each participant CTS is only a measuremen of the latency from CTMS to that EP

Its possible for the end-to end latency from one CTS through the CTMS to another CTS to exceed 250 ms as n your case but CTS wont realize, CTMS is the only device that is aware of this end-to-end latency.

When we have the MP Call, audio and video RTP packets timestamps s re-written by CTMS therefore the latency meausred by each particpant. Os its possible that end-to-end latency exceeds, but TP system will never realize so its ok.

Justin Pascal Sat, 03/06/2010 - 18:12

Oh ok

thanks,

Im trying to start Scheduled meetings remotly? call start doesnt work which tool do you recommend sir?

thanks ganzalo

chatura Tue, 03/09/2010 - 21:50

Hi,

Thank you very much for the  reply above

Regards,

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