[Asterisk-Users] problem calling SIP accounts

[Kanishka Somaratne]

Hi
I have configured sip accounts and they work some times. when i make a call 
to another SIP account it works right
but some times i get the following error

Jul 29 07:17:00 WARNING[802]: chan_sip.c:694 retrans_pkt: Maximum retries 
exceeded on call 78a2143444d2be290aa530650ef47965 at 216.75.236.11 for seqno 
102 (Critical Request)

this happence when i register the SIP users and stay for some time and 
dial.but no problem with out going calls, can call any time.


Regards
Kanishka