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Page 154 of 504 M 3900 description
553-3001-367 Standard 3.00 August 2005
Note: The MEARI is an interface only. The ringer, light, buzzer, or
other alerting device is to be obtained through a third-party vendor of the
customer’s choice.
Accessory Modules
The Display-Based and Key-Based Accessory Modules are mutually
exclusive. A set with one or two KBAs configured or installed cannot have a
DBA.
Both the KBA and DBA modules are loop-powered and do not require the
110V wall transformer. Neither the KBA nor the DBA modules is supported
for wall-mount applications.
Key-Based Accessory Module
The Key-Based Accessory Module (KBA) attaches to the M3904 and M3905
Digital Telephones. The KBA provides 22 additional line/feature keys. These
keys are equipped with clear key caps and paper labels. You can attach a
maximum of two KBAs to the M3904 and M3905.
The KBA requires an additional footstand kit to secure the module(s) to the
set. If using one KBA, Kit 1 must be ordered. If installing two KBAs on the
same set, Kit 1 and Kit 2 must be used. If a second KBA is being installed on
a set with an existing KBA and stand, only Kit 2 is required.
Display-Based Accessory Module
The Display-Based Accessory Module (DBA) provides additional line/
programmable feature keys (soft-labeled) for the M3904 and M3905
telephones. The DBA supports up to 3 layers of 8 additional keys for a total
of 24 keys.
Note: Refer to Table 22 on page 147 for a list of the telephones with
which the DBA module is compatible.
A Page fixed key located on the DBA allows a user to switch between the
three layers of soft-labeled programmable feature keys. Visual indication is
also provided to indicate which page (or layer) of soft-labeled programmable
feature keys is in use. Feature activation and deactivation on the DBA keys is
the same as the programmable feature keys on the M3904 and M3905.