PAT when multiple SIP phone

Dear Rene,

Can you please tell me how do i configure multiple IP phone which all are behind ASA. i am getting trouble in incoming calls somehow incoming call from outside world are not passing through. IP phone registration are fine even outbound calls but incoming calls. SIP Server are in hosted Environment. do i need to any special configuration for same. please help.

Hi Ranjana,

This can be difficult to troubleshoot. It depends on the SIP phones/server that you use and where everything is located. I would suggest to start checking the NAT guides for the SIP server that you use. Most of them have a couple of recommendations how to deal with NAT traffic.