Current Status

Possibly compatible after changes.

Suggestions

Adjust router settings.

Comments

We have encountered a scenario in which a router running the Tomato firmware would only let one phone register at a time. We resolved this problem by entering the router settings, under ‘Advanced’ and then ‘Conntrack/Netfilter’, where we enabled the SIP option for ‘Tracking/NAT Helpers.’ The router on which this was encountered was an Asus RT N16, but this issue and resolution may apply to other routers running Tomato.

**All routers and firewalls must forward the correct ports and configure Whitelisting for Hosted Voice Services; please click here for more information.