Chan sip.c:1786 sip xmit: sip xmit of 0x81cbc78
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If you see something like this:
[Jul 8 09:15:35] WARNING[5344]: chan_sip.c:1786 __sip_xmit: sip_xmit of 0x81cbc78 (len 409) to 193.37.150.162:5060 returned -1: Operation not permitted
That means asterisk can't send a packet outside. Check your OUTPUT table in firewall.
