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Posted by on January 10, 2007, 2:23 pm
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On Tue, 9 Jan 2007 15:10:40 -0800, "Henry Cabot Henhouse III"
>I'd like to extend 2 analog pbx lines off site. We have multiple managed
>bonded T's at the main site, and at the remotes a basic Verizon dsl at one
>and a Comcast (or is it Time Warner this year?) business HSI at the other.
>When someone calls the extension, the off prem analog line should ring. When
>I go off hook, I should get pbx dial tone.
2 pair of Linksys SPA3102 will do. One for FXS and one for FXO gateway
role. If you can do the setup, it costs less than 400 USD.
However, as at least one of them gets dynamic IP address, you need a
public fixed IP VoIP switch to maintain the actual IP address. This
kind of service is available free of charge, eg at
http://www.voxalot.com
If you have firewall at the central site, it should be configured to
pass the UDP calls to the 2 SPAs (eg. 5060 and 5061 UDP port,
respectively, plus a range for the voice channels). The SPAs should be
configured accordingly.
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