In my school some donor donating internet, computer and eSpace 7830 IP Phone. I never saw such IP phone. How it work and what things I can do with the device? Need a computer with the device? If I made a call via the phone, receiver need same type of phone to receive? Is it an internet telephone? Can I make call from such IP phone to any cellphone? (etc)

 

This should answer most of your questions.

Huawei IP Phone eSpace 7830 Product Description V1.3