I have tried changing X_UserAgentPort from 5060 to 5070 or from 5061 to 5071. After I changed it, then in first calling in, it rings and can talk and can hear "tick" periodically 7s , but in second calling in, it rings and no voice in the phone, in third calling in, no ring.
Because I'm not very familiar with my router, I don't know how to forward this UDP port in my router to OBi. I'm learning it. I appreciate that you can tell me how to do it.
In Security log in my router, it shows a lot of errors. Do you think the router blocked this UDP port?
"Oct 19 14:36:20 2011 Firewall Error Firewall internal SIP ALG: Failed parsing. Error code: -1019 [repeated 2 times, last time on Oct 19 14:36:20 2011]
Oct 19 14:36:02 2011 Firewall Error Firewall internal SIP ALG: Failed parsing. Error code: -1020 [repeated 4 times, last time on Oct 19 14:36:18 2011]"