Cisco ATA 192 Multiplatform Analog Telephone Adapter, 2-Port Handset-to-Ethernet Adapter, 1-Year Limited Hardware Warranty (ATA192-3PW-K9) (Renewed)

If you miss the pleasant BANG of the phone when you don't want to talk to someone anymore, this is the adapter for you!! Keep in mind it uses touch tone dialing. The only complication is getting your SIP provider set up (I use voip.ms), but once you enter the info it's a simple matter of keeping the connection active and the service provider paid on time. This is not a SIP server, so you'll need to set up a proper PBX (ie 3CX) if you're looking to set up office phones.TL;DR - This adapter allows you to use a regular phone with SIP (virtual phone) provider.

Nonfunctional-

Very good. samll and efficient.

This is a great product. Only thing that was bad was the power adapter only came with the EU plug attachment. No US attachment was in the box. Once I got that figured out works like a charm!

No issues works great

Tried and tried to get these to work with my cable Internet. Finally gave up and tried a Grandstream product and got it working easily. The setup looked simpler on the Cisco but I just couldn't get them to work.

It was an inexpensive alternative but became a non-supported device without support from most carriers. Most will have their brand and it will not have to be provisioned by tech support.