How to make an internal call
To place an internal call, dial the 5-digit extension number. If your phone number is 646-962-9999, your extension will be 1-9999. If your phone number is 212-746-9999, your extension will be 6-9999.
How to make a local or long distance call
To place a local call or long distance call, dial 9 + 1 + the area code and the number.