Max RTD for Phone registration??

[cplatt01]

What is the Maximum RTD you can have for phone registration? I have a cnetralized deployment, but wanted to place a few phones overseas where the round trip delay is about 285 ms.

Thanks in advance!

[b.hsu]

I think RTD should be around 150 ms between originating gateway and terminating gateway

[tomchan]

Our experience. CCMs are all installed in Tokyo headquarter and London office (remote branch) is just phones and local PSTN/SRST router installed. And Tokyo to London 45M IPLC connection is 246 ms RTT (Round Trip Time) in average. Result is okay!! No voice quality issue so far. Thx.