registeration of sip

tricky Sat Jul 12, 2008 1:37 am

Hi
My call between to sip mode is working allright but when ever iam opening my X-lite on CLI iam getting this msg

Code:
Registered SIP '2000' at 192.168.1.40 port 5062 expires 1800
[Jul 11 16:15:23] NOTICE[3342]: chan_sip.c:12599 handle_response_peerpoke: Peer '2000' is now Reachable. (2ms / 2000ms)

what does this message ,means Registered SIP '2000' at 192.168.1.40 port 5062 expires 1800

I feel this msg shows that the number 2000 is registered but when iam giving command sip show registry
It doesnt show anything .
Can anyone explain it