The Sipura 3000 and the Zoom V3 are the only two consumer TAs with a PSTN failover port.
It seems that the Sipura is doing a FAR better job promoting their product but the Zoom seems to have some merit (four port router and a DSL modem option).
In your opinion, which is better and why? Do they provide the same compatibility with VoIP services (Broadvoice, etc.)
The SPA-3000 goes much farther than PSTN failover. Its PSTN side interfaces with its own VoIP provider, provides gateway services, and remote access services. Nobody else puts this functionality (yet) into an ATA package.
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Sipura 3000 vs. Zoom V3 
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