SIP boxes
 

I'm looking for a SIP adapter to sit between my POTS line and handset. I'd like to be able to use it for making calls to the home phone and through the home phone. I tested a similar box for Skype but it depended on the discontinued Skype quick dial feature to make outgoing calls, so I returned it. I had the URL for a company who made a number of SIP adapters like this but I misplaced it and can't find it now.

Cisco/Linksys SPA-3102: Cisco SPA3102 Voice Gateway with Router - Cisco Systems