Nortel Networks 2004 - Manual (Page 128)

Hospitality features
128
Activate Message Registration
Use the Message Registration feature to read, change, or reset meters
that log your hotel telephone calls.
To read meters:
To change a meter:
4. Press the Goodbye key.
1. Press the Message Registration key.
2. Dial the room Directory Number (DN).
3. Press the Message Registration key.
1. Press the Message Registration key.
2. Dial the room DN number.
(Goodbye)