[cisco-voip] Calls intermittently complete

[CarlosOrtiz at bayviewfinancial.com]

We have an office in the UK that is connected via LAN to LAN VPN.   They 
have about 5 hard Cisco IP phones and a few users using IP communicator 
that are using our Call Mge here in the US for site to site calls.   They 
have complained that calls do not complete sometimes.  I did some testing 
with a guy using IP comminicator and he would see my call coming in but 
was unable to pick it up.  I was watching with the Call Mgr admin and 
noticed that his IP comminicator phone changed status from registered to 
not registered when he attempted to answer the call.  I simultaneously was 
pinging his phone and never saw a lost packet.  A couple of trys later and 
the call completed, we had a conversation but he saw the message "CM, 
Features Failed". 

Anyone have any insight here?

Thanks,

Carlos
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