Nortel m3900 series User Manual page 70

70 Hardware options
three layers of self-programmable feature keys. The labels change
according to the features programmed for the next logical set of feature
keys shifting through the display. A visual indicator shows which page (or
layer) of self-labeled programmable feature keys is in use.
The first key of the DBA maps to Key 33. The user can change the feature
key labels by selecting "Change feature key label" from the Options list on
the M3904 or M3905.
Use SERVORD commands to provision the DBA as a line option. Once a
DBA has been added to a set, you can assign feature/DNs to the extra
keys. The Meridian SL-100 uses a key map to download the DBA key
assignments to the set. The DBA firmware handles the self-key labeling.
The self-key label can be up to 10 characters in length.
Only one DBA can be added onto a either an M3904 or M3905 set only.
You cannot combine a DBA with a KBA.
Figure 9 "DBA expansion module" (page 70)
Figure 9
DBA expansion module
Copyright © 2008 Nortel Networks
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Nortel Communication Server 2100
M3900 Series Meridian Digital Telephones User Guide
NN42200-110 09.01 Standard
20 August 2008
shows the DBA.