This will change which phones ring when a caller dials your phone number. It assumes a Plug & Play Phone System from TelephoneSystemsDirect.com but should work on any NEC DS2000.
For technical support call 866-898-2303.
At the phone you wish to change (either changing the phone to ring or stopping the phone from ringing) with the handset down press #725.
The line keys should light up. Press each line key to change whether the phone rings on that line.
A solid green button indicates the phone will ring when a call comes in on that phone line. A solid red button indicates that the phone will simply flash.
Press the speaker button when finished.