Samsung LCD12B - Manual (Page 62)

The add-on module (AOM) is used when you need more
p rogrammable keys. The extra programmable keys are used exactly as
a re the ones on your keyset. Make them DSS/BLF keys, C.O. line keys,
One Touch Speed Dial buttons or any combination of these and other
f e a t u re keys. A maximum of two AOMs can be added to any keyset.
55
AD D-ON MODULE
WITH KEYSET
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