Thank you. With your idea, yes i see that my switch rejects the outbound calls, the reason is the "from field" being sent out by pbxnsip is with some additional numbers.
The Caller ID was added in the main number:
example:
sip.From == "<sip:1514448038243@sip.domain.ca>
In the ext.43, I see that Block outgoing caller-ID: is NO, then I changed this to YES, the from field becomes;
sip.From == "<sip:15144480382@sip.domain.ca>
That fix my issue.
But, my question now is that if this Block Outgoing Caller-ID is set to NO, why the ext. number was attached with the main number in the from field?
Thanks again.