Comment on Exploring and having fun with rotary telephonesComments−8bitsrule1yThe article's link to sip2sip.info usefully led to a SIP Settings page, which in turn discussed NAT traversal & linked to how to 'Turn off SIP ALG support in your router' on another helpful site.
Comments
The article's link to sip2sip.info usefully led to a SIP Settings page, which in turn discussed NAT traversal & linked to how to 'Turn off SIP ALG support in your router' on another helpful site.