[cisco-voip] thirth generation Ip Phone like 7911

[alessandro.bertacco at alice.it]

Hi all, anyone resolved problem of de-regestration over WAN link of the 7911 Cisco Ip Phone?
 
My remote site, with a very good round trip delay, and 7911 have many problem with that phone. No problem detected on the same site with old 7912 phone.
 
I've already modified on device pool keep alive setting from 120 sec to 240 sec. Nothing changed.
 
Any suggestion?
 
Many thanks
 
Alessandro Bertacco
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