I have 2 x 955 4g routers with 2 x audio devices connected to each one. They provide 2 x separate audio links between 2 x sites.
One link works fine using a SIP port forwarding on port 5060, the other one will not work. I have tried various port numbers but only port 5060 will make them work. If I switch the SIP helpers off then the link will not work even on 5060. Do the helpers only work on port 5060? or should they work on any port. They are connected with a public fixed IP address, and are on vodafone 4G
FIrmware is ver 00.06.09.2