Macros in Aastra 6869 Speed dials

Hi All,

Am I missing something obviously on the Aastra 6869. I want a button to call a number, wait, enter some more numbers, press #, then mute the phone

I have gotten 123456,1234# which works fine - but how do I send the mute?

With Polycom I was able to send a command to mute the phone, I think it was $MicMute$ or something similar.

Thank you

M