This project was working perfectly on a standard ADSL modem but ive migrated to a Cisco 3945 router and it does not work fully.
Cisco 3945 with Voice license
1 x 4G Samsung phone with Zoipher that registers to my SIP server over the WAN
2 x LAN connected SIP clients
1 x FreeSwitch Server on Windows
You're free to change the setup, but this was working using FreeSwitch fine on my lan until i changed things over.
NAT & Voice skills on Cisco
So far, I've been successful in getting all calls to work on the LAN only. And sucessful in getting my 4G mobile device to work on SIP, however my issue is theres no Audio.
Persumably because this relates to NVI NAT, SIP or a lack of RTP.
Your job is to get this working :)