All incoming calls are answered live on desk phones (Poly Edge).  How do I program the RingCentral system to display Custom Caller ID information on incoming calls from non RC users such as clients or employee cell phone numbers.

IE - if cell number 973-222-2222 calls our main phone number and the user of that cell number has chosen to display only the phone number, I want to program the system to recognize it as “JOHN SMITH CELL” and have that text displayed instead of or in addition to the caller id information being pushed by the carrier.