DEAR ALL,
I AM A USER OF KX-NS500 WITH NO EXPERIENCE IN PBX. I HAVE OLD INSTALLED NS500 WITH 1 EXP-M OF NS520. I HAVE A DOOR PHONE WITH RINGS ON 2 EXTENSIONS ONLY. WE NEED TO ADD ANOTHER EXTENSION FOR THE SAME DOORPHONE TO MAKE IT RING ON OTHER PHONE NO. ALSO.
AIPHONE IS AUDIO BASED 2WIRE...
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