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This is the support site for Andrews & Arnold Ltd, a UK Internet provider. Information on these pages is generally for our customers but may be useful to others, enjoy!
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NAT on our Voiceless platform does work in many cases. However, due to the nature of NAT, and the numerous implementation and 'fixes' and 'bodges' in routers, it can be tricky to get working. Lots of the phones that we've tested do just work without the need for an ALG,
We'd always suggest using public IP addresses for VoIP devices.
If you do want to use NAT, then here are some tips if you are struggling:
*Disable
*Disable SIP ALG on the router (
*Disable Stun settings on the VoIP phone (or try enabling it
If NAT works, then well done, but if not we cannot guarantee to be able to make it work. We can provide broadband lines with constant quality monitoring and public IPs that can be used for VoIP - even multiple lines through different back-haul suppliers for extra resilience.
Further information: http://aa.net.uk/kb-telecoms-sipnat.html
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