IP phone and VOIP Gateway are next generation of telecommunication. They are compact size, high quality voice, powerful device. 

Callika Support many kind of IP phone and VOIP gateway. However, the suggested Device for home user is the following gateway:

• Linksys PAP2T
• Linksys SPA3102

For the business user the suggested Ip phone is:

• Polycom SoundPoint IP 335
• Polycom SoundPoint IP 321 and 331
• Polycom SoundPoint IP 550

You need Internet to use these devices. if you already have a router you can place this unit before or after it and it will act as a simple Telephone Adapter. 

You will simply plug it into your current Broadband Modem and it will connect directly to Callika servers (No matter what type of Broadband you use: Cable, DSL, etc.)