Nortel Meridian M3900, Справочное руководство

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Hardware options 69
Meridian SL-100 M3900 Meridian Digital Telephones Reference Guide
There are 32 keys on the M3904 and M3905 sets. The M3904 and
M3905 sets support one or two KBAs with 22 keys each. With one KBA,
the key numbers are from 1 to 54 with the first key mapping to key
number 33. With two KBAs, the key numbers are from 1 to 76, with the
first key on the second KBA mapping to Key 55.
Note: You cannot combine the KBA with the Display-based
Expansion Module (DBA).
You provision the KBA through SERVORD commands.
Figure 8 shows the KBA.
Figure 8
Key-based expansion module accessory
Display-based Expansion Module (DBA)
The DBA is an optional add-on module for the M3904 and M3905 sets
exclusively. The module attaches to a set to increase the number of
programmable feature keys on the set by 24 for a total of 56 keys.
The DBA has keys 33-56 supporting up to three layers of eight
programmable feature keys. It has eight self-labeled keys with the
feature labels next to the key. A Page fixed-key allows switching
between the 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.
Note: 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.
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