Here goes. Use a 10 or 24 button set. Go in through admin programming, not the config.
Enter Feature ** 23646 and a password of 23646.
You will notice 3 buttons light up, 4 once you enter a topic.
They are used for programming and are designated as follows
Heading Show
Back Next
Your screen should say Administration
Hit the show button.
Hit the next button until you get to Capabilities.
Hit show
Hit next until you get to Set Abilities
Hit show and enter the ext you`re wanting handsfree on
Hit show
Press next until you get to Handsfree, and then change it to Yes. (using the keys under the screen)
After you`ve changed it to Yes, hit next and it will come up Auto Handsfree. Change that to Yes if you like. If it remains at no, you`ll have to hit the handsfree button in order for you to be heard.
After that, just hit Rls and you should be good to go.
Let me know if you have any troubles, and if you seem to get lost in the programming, just keep hitting the heading key until you get back to the Administration prompt, or hit release and try again.
Schlum