Hi, I'm struggling with this kind of problem: my hardware sip phone is registering to Asterisk 1.2.10 successfully, but when I send INVITE to server - it receives the packet but (in sip debug mode) I see: 'Ignoring this INVITE request'. While searching in 'chan_sip.c' I've found that this message shows up if variable 'ignore' is being set. This is when if (p->ocseq && (p->ocseq != seqno)) { ignore = 1; } unfortunately there aren't any comments around, so anyone could explain what exactly is happening? regards, L.