In this post I will show you how to connect & configure one IpPhone Linksys SPA942 using an Asterisk Pbx 1.8: I hope this can help you with other similar IpPhones (Linksys SPA942 is in “End-of-sale “)
To start you have to verify the firmware version used by the phone: connect to the web interface on the IpPhone and check the info tab check.