[Asterisk-Users] SIP through firewall is intermittent

[Chris Mason (Lists)]

We have a PBX in a datacenter in the US and the receptionist is here on Anguilla, her phone and one other, Sipura SPA-841s. are behind a Linksys router doing NAT to an ADSL line. Generally it works fine but occasionally the receptionist cannot hear any voice after the extension rings.   Other than portforwarding, which won’t work as there is more than one phone, is there a way to improve this setup? Is there a router that would work better? Or maybe a configuration setting that would improve reliability.   Chris Mason www.anguillaguide.com

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