asterisk users - May 2011 - log full of Name or service not known

Hi!

Here's a user with mobile phone - however why does it treat this as ERROR ?

I have a log full of that ---


    -- Registered SIP '0010106' at 212.93.100.181:3698
[2011-05-12 16:07:57] NOTICE[30258]: chan_sip.c:19679
handle_response_peerpoke: Peer '0010106' is now Reachable. (212ms /
10000ms)
[2011-05-12 16:07:57] ERROR[30258]: netsock2.c:245
ast_sockaddr_resolve: getaddrinfo("212.93.100.181:3698",
"3698", ...):
Name or service not known