12-17-2012 11:04 AM - edited 03-16-2019 02:46 PM
Hello,
We have a Callmanager cluster 8.51 in NYC and trying to set up IP Communicator at our Hungary office. They will be using NY DIDs, so their inbound and outbound calls will be routed over to the PRIs at NYC. What is the max latency or cisco recommendation between CM and IP Communicator? Any input will be appreciated.
Thanks
Mark
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12-17-2012 11:08 AM
There is no maxium set. Some people uses phones over sat links with RTT > 1 sec and it works fine.
12-17-2012 11:50 AM
From CUCM SRND:
The influence of latency on design varies, based on the type of Unified Communications service considered for remote deployment. If a voice service is hosted across a WAN where the one-way latency is 200 ms, for example, users might experience issues such as delay-to-dialtone or increased media cut-through delays. For other services such as presence, there might be no problem with a 200 ms latency.
There is also a good table showing estimated load download times based on the latency.
Chris
12-17-2012 11:08 AM
There is no maxium set. Some people uses phones over sat links with RTT > 1 sec and it works fine.
12-17-2012 11:47 AM
Thanks for the input Paolo. The latency between NYC and Hungary is about 190ms. We will give it a try.
Mark
12-17-2012 11:50 AM
From CUCM SRND:
The influence of latency on design varies, based on the type of Unified Communications service considered for remote deployment. If a voice service is hosted across a WAN where the one-way latency is 200 ms, for example, users might experience issues such as delay-to-dialtone or increased media cut-through delays. For other services such as presence, there might be no problem with a 200 ms latency.
There is also a good table showing estimated load download times based on the latency.
Chris
02-08-2014 11:59 AM
You should target below 150 ms one way delay, as per ITU-T G.114. Over that, the delay starts being noticeable for the speakers.
cheers
Isidro
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