# PIN Numbers for IP Device Registration

The PIN number used for registering an IP device at the station is a sequence of characters. The characters used are those from the telephone keypad (1, 2, 3, 4, 5, 6, 7, 8, 9, *, 0 ,#).

A PIN number consists of two parts:

- The first part is the code programmed in the Systems Options form as a Set Registration Access Code or Set Replacement Access Code. Either code can be up to 10 characters in length.

- The second part is the directory number or extension number of the IP device. The directory number can be up to 7 digits but is typically 4 or 5 digits.