I couldn’t think of a better title. Here’s how it goes: [onno] wanted to convert a DECT phone for VOIP use. First he tried using transformers for the audio, but was unhappy with the noise and echo. He describes how to do a direct tap like [Christoffer]‘s Skype phone, but includes all of the necessary measures to keep from frying your sound card. The main piece of this project is his hacked “chan_oss” driver for Asterisk. Using the driver, Asterisk is able to ring the DECT phone. It also detects whether the phone is off-hook by comparing the sound input to the known line noise level. The phone can dial using DTMF just like any standard phone.