Summary: So far can't get this to work with my Asterisk system - seems the device wants to act as a router to the Internet. The SPA3102 was a replacement to an earlier version that went bad. Still working on trying to make the new one work.
Router part limited to ~10 Mb/s throughput, so you probably want to use it in bridge mode
27 November 2014
Summary: Replaced a failed Sipura SPA3000 with this one. When I tested the router part they added, it limited my throughput to ~10 Mb/s but fortunately it has much more throughput in bridge mode so I could still have my entire LAN on a switch downstream from this box and let it prioritize my VoIP traffic. I agree with the other reviewers that this is a very capable device, but you need to invest some time in configuration.
Summary: My objective with this gizmo was to get a traditional fax machine set up using VOIP. I previously had tried the PAP2T, but the PAP2T only converts the 'sound' of the fax signal to digital and back over the line, which often introduces enough distortion to corrupt the fax transmission enough that it never goes through.
Summary: Works great; I had a Sipura 3000; it's basically the same and it works perfectly well. The only complaint about it is that it does not have the pre-drilled holes in the back to attach it to the wall (the marks are there, but I have read that they are not supposed to be punch out.
Pros: I as able to integrate this FXO/FXS module into my home asterisk server very easily. I was pleasantly surprised to see that it actually pushed the caller ID info to the analog phones without any extra configuration. I guess that's the power of voip/Asterisk.
Cons: Analog ringgers sound a little funny. Maybe I'm trying to ring too many phones simultaneously. Not really a con, just an observation.
Summary: I purchased this device as a one shot solution to use as an IP connection to my freepbx for my home telephone line. I'm a loyal cisco customer, and I assumed that this device would work as promised. My wife and I both noticed an annoying echo, and I delved into the universe of 3102 echo tuning.
Summary: We are using this as an Analogue to Digital Adapter for our local fax with Vocalocity digital telephone service. They installed, calibrated, set it up and did a smashing job. This was the second ADA that we purchased, as the first would not allow us to receive faxes although we could send them out. If this is what you need, this is the product for you. If it functions well in any other capacity, I cannot tell you.