[asterisk-users] retransmitting NAT

[Nhadie]

Hi,

What does retransmitting NAT means? I have a client that uses SPA 942, 
and his phone sometimes cannot be called. i did a sip sebug and i keep 
on seeing retransmitting NAT.

on the realtime it shows that it is registered, so when i try to call it 
, asterisk thinks it is still online so it tries to reach it instead of 
saying it's unavailable,

[Oct  9 11:10:33]     -- Called 103100

it stops there until it reached the timeout i set then it will say 
unavailable.

is there a way that realtime will know that the phone is not registered 
anymore? or what could be causing the retransmitting of NAT? has anyone 
encountered the same prob? thank you

regards,
nhadie