I have several SPA509G phones running the SIP protocol with asterisk. I am able to configure the phones via their built in web interface and get them to register and make calls. However I cannot find any documentation on customizing the softkeys. I need to change the keys from their defaults to add selections like park etc. Via the webgui of the phone there is a section for programmable softkeys but changing those settings does not seems to have an effect it also is not clear on how to tell it what each button is doing. Either web based config or xml will do but I just cannot find the documentation. Thanks.