Avaya 10bs User Guide

You can use most of your phone’s features either by pressing

programmed line buttons or by dialing feature codes,
depending on the following:

The number of unlabeled line buttons.  If all the line buttons

have lines assigned to them, you can use features only by
dialing feature codes. If there are unlabeled line buttons, you
can program features onto them. You can then use the
feature by pressing that button instead of dialing the feature
code.

Some features, such as Last Number Dial, cannot be used
with feature codes. You need to program a button to turn the
feature on and off. The light next to the button provides a
visual reminder when the feature is in use. The following
features require programmed buttons. For more information
on Programming codes, see Appendix C.

Using and Programming Features