ABOUT YOUR PHONE
The Mitel 5212 and 5224 IP Phones are
The personal key on the bottom (left on 5212, right on 5224) is always your Prime Line; the remaining personal keys can be programmed as:
zFeature keys (for example, Swap). You can program feature keys from your phone. Your administrator can also program feature keys.
zSpeed Call keys. You can program speed call keys from your phone.
zLine Appearances. Only the administrator can program line appearances.