Hello all, In order to check that our Openser is running properly I use sipsak periodically. The command is : sipsak -v -N -U -I -s sip:sipsak@213.5.xxx.xxx:5060 -a xxxxxxx This works fine 99% of the time, however sometimes I get the following from sipsak : warning: ignoring -i option when in usrloc mode received: SIP/2.0 400 Bad Request Via: SIP/2.0/UDP 127.0.0.1:54393;branch=z9hG4bK.4d383307;rport=54393;alias;received=213.5 .43.131 From: sip:sipsak@213.5.43.131:5060;tag=44d4f5ef To: sip:sipsak@213.5.43.131:5060;tag=97e44c910458bd56beb40ca4028d7cc8.91db Call-ID: 1154807279(a)127.0.0.1 CSeq: 2 REGISTER P-Registrar-Error: Invalid CSeq number Server: Altec Telecoms SIP Proxy Content-Length: 0 error: didn't received '200 OK' on register (see above). aborting SIP failure sipsak is running on the same server with Openser. Since the CSeq is 2 it means that Openser has received the first REGISTER, has asked for authentication, sipsak replied, but then Openser says "Invalid CSeq number". Has anyone seen this happen before and/or has a reasonable explanation? thank you George Disclaimer The information in this e-mail and any attachments is confidential. It is intended solely for the attention and use of the named addressee(s). If you are not the intended recipient, or person responsible for delivering this information to the intended recipient, please notify the sender immediately. Unless you are the intended recipient or his/her representative you are not authorized to, and must not, read, copy, distribute, use or retain this message or any part of it. E-mail transmission cannot be guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses.