This How-To covers setting up a conference on an Avaya B149 Analog Conference Handset. These handsets are supported from R7.0.
I have personally tested these steps on R9.0 and R9.1, but they should apply to any release the handsets are supported on.
Check there is a *47 Short Code in the IP Office configuration with the Feature set to Conference Add. If *47 is being used by something else other than Conference Add, create a new Short Code and use this new Short Code in the below steps.
1: Modify The Phone Settings
If you accidentally delete the F, press the green answer call button.
2: Setting Up The Conference
3: Adding The First Party
Dial the first participant for the conference. When they have answered, press the OK button on the handset to confirm that they will be joining the conference.
4: Adding The Second Party
5: Complete The Conference
I thought it would be useful to create a guide for this as I’ve spoken to a few people who have had issues setting up conferences with these handsets as the documentation for them isn’t quite clear.