VoIP adapter question?
 

My family recently purchased the cable internet connection for a year and the cable service includes free home phone service, but I need a VoIP adapter. I am trying to buy a VoIP adapter and I found a seller for VoIP adapter and he is offering two types of adapters

The SPA2102 for $50
The PAP2t for $30

He told me both are compatible with my internet company, but SPA2102 comes with a router.

Which one should I get? There are two phones in my house. Do I need the VoIP adapter with the router in order for my family to be able to use multiple phones? My family already has a normal wireless router that provides sufficient Wi-Fi connection.

Moderator Response
 

Moved: This thread is more suitable in <General> and has been moved accordingly to help your thread/question get the exposure it deserves.