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@Pete Wells I'm currently checking the answer for your question. I'll get back to you soon.

@Pete Wells Have you tried by pressing *85 and following the prompt instead of pressing the Intercom button?

That works as does pressing the intercom button then the extension. Neither of which answers the question.

With the T48s phones with have the EXP40 expansion module and it can be programed with intercom speed dials however when we try to use them it makes a normal call. How do we get that function to work?

Unfortunately, pressing the intercom key and then a presence line will not initiate an intercom call - it will simply call the user (as you've noticed).

The only workaround would be to set manual speed dials with the intercom star code and their extension. Ex: let's say I want to one touch intercom extension 200. I would add a manual speed dial on my Yealink phone and use *85*200 as the contact # and enter in the user's name/extension as the label.

Thanks for the workaround. Not a very user friendly way to do this but it works. Should be able to use the phones features how they are made.