Do you have any spare keys on the handsets?
if you do you could always set up a PhDN as a park button that will flash on all handsets so anyone can pickup the held call.
You need more that more than 1 but not as many as 8 so you might be able to squeeze it onto the hansdets.
With the operator you can't press park/orbit and use a DSS key as you have to input the extension or orbit number on the keypad.
If you give everyone a park/orbit key and then someone parks a call for your extension it will light up on that handset and can be pressed to retreive the parked call.
You will however need to know the extension number when placing the call on park in the first place.
Your other option is to install some 20 button ADM's on the operators handets or the main ones in the office so you can display the CO line keys and do the job properly, it was obviously under sold for what the customer really wanted.
Good luck with it
