Unable to use conference button

Here are the instructions for making a conference call on a Norstar system.

Conference [Feature] [3]

• Establish a conference call between yourself and two other parties.
  1. Make or answer the first call.
  2. Put the first call on hold.
  3. Make or answer the second call.
  4. After the second call is connected, press [Feature] [3].
  5. Press the line or intercom button of the first held call.
  6. Press [Rls] to end the conference call
• To remove yourself from a conference permanently (unsupervised conference):
  • Press [Feature] [7] [0]. The other two callers remain connected. (Some external lines may not support this feature.)
• To put a conference on hold:
  • Press [Hold]. The other two callers can still talk to each other.
• To split a conference:
  • Press the line or intercom button of one caller to consult privately while the other caller is on hold. To re-establish the conference, press [Feature] [3].
• To disconnect one party:
  • Press the line or intercom button of the caller you want to disconnect, then press [Rls].
  • Press the line or intercom button of the remaining caller to resume your conversation.
• To independently hold two calls:
  • Press the line or intercom button of the first caller, then press [Hold]. The second caller is automatically put on hold. To re-establish the conference, retrieve one call from hold, press [Feature] [3], then retrieve the second call from hold.