The Phone clause of the Add Person command associates a telephone number with the person you are defining. This number could be an internal extension number, business phone number, car phone number, or home phone number. The Phone clause is restricted to 64 characters.
For example, you could assign a phone number as follows:
add person andrea
phone “business: x433, home: (203) 987-6543”;
You can include additional information about the number to guide those who might reference it.