Configuration and setup VoIP technical articles.
CISCO LINKSYS SPA2102 - VoIP Phone adapter
Zoiper Classic a great softphone that is easy to configure on your PC or Laptop. You can also use it from your Mobile.
jimmyTel can be used from you PC or Laptop by using a software that is called softphone. You can make calls in and receive call from too, just like a regular phone. you will need a mic and speaker or any headset with Microphone and speakers.
CISCO LINKSYS SPA112 - VoIP Phone Adapter
CISCO LINKSYS SPA2100 - VoIP Phone Adapter
X-Lite is a very basic softphone software for PC and laptops
Configuration for supported adapters