How do I mute my MLS-34D when using Speakerphone?

If you want to transfer directly to the voicemail without ringing; hit FEATURE 14 then the extension you want.

Changing time on a Partner.

There you go!

To program the keys on your set press feature 00, press the button you want to program, then enter in the function, intercom, or telephone number you want. Press additional buttons to program them, press feature 00 to exit programming

Your system lost its programming. Call in a tech to fix, as this is pretty involved programming.
Post back if you need a technician.

At station 10 with a display enter feature 00
press left intercom twice and enter #103 and enter the time in military format.

Flash or recall is used by pressing feature 03. You can program a button to use recall by pressing feature 00, pressing a button you wish to program as recall, and pressing feature 03. Enter feature 00 to exit programming.

If your administrator enabled that feature you should be able to do this through Feature 11 on your phone.

This cannot be done on Partner ACS and your phone.

Your system is actually called Partner.
Compatible phones will consist of MLS12, MLS12D(display),Mls18, 18D(caller id display), 6D(display), 34, 34D(display) No other phone will work on this system
To program phone numbers
Press Feature 00, press/select a buton to program, input speed dial number. Press Feature 00 again.

Check out your user's manual, but I think you need to start programming lighted buttons with FEATURE 16 and 17.

Carl