How do I find out my extension number on Nortel Norstar?

Follow these steps to see what extension number your Norstar telephone has, or what feature or number is stored under the memory keys.

With the handset on the rest and the telephone free of calls:

  1. Press Feature * 0 (zero).
  2. The display will show: Key Inquiry then press a key.
  3. Press any intercom button.
  4. The display will show your extension number.
  5. Press any programmable button.
  6. The display will show the feature or number stored on that button.

If your telephone is an M7100M7100N or T7100 your extension number will be displayed immediately after pressing Feature * 0 (zero).