9-4
Chapter 9
Installing Keyset Daughterboards
iDCS Keyset Daughterboards
One of three types of daughterboard can be installed in an 18D or 28D keyset only: an FKDBD,
FKDBS, or FKDBF.
KDB-Digital Line Interface (FKDBD)
The FKDBD provides one additional DLI circuit for the connection of any digital station device
such as another keyset, an add-on module or door phone interface module. This FKDBD will
only operate when the keyset is connected to an 8-port DLI card so that it can use the second B
channel. Each port on this card is intended for connection to one telephone.
CAUTION: Connecting multiple telephones to a port may result in incorrect operation or
damage to the card.
Read Installation Procedure
, below.
KDB-Single Line Interface (FKDBS)
The FKDBS provides one additional SLI circuit for the connection of any standard telephone
(SLT). This FKDBS will only operate when the keyset is connected to an 8-port DLI card so that
it can use the second B channel. Each port on this card is intended for connection to one tele-
phone.
CAUTION: Connecting multiple telephones to a port may result in incorrect operation or
damage to the card.
NOTE: The circuitry on a FKDBS does not provide a loop open disconnect signal or
have the over-voltage protection necessary for OPX operation.
Read Installation Procedure
, below.
KDB-Full Duplex (FKDBF)
The standard speakerphone mode of operation for an iDCS keyset is “half duplex”. This means
that you cannot transmit and receive speech at the same time. Adding an FKDBF to your keyset
will convert the speakerphone into full duplex mode, enhancing its operation. In addition, the
FKDBF may have up to three external microphones attached to it for conference room type ap-
plications. These microphones require an “EXTMIC” key programmed on the keyset to activate
or deactivate them (refer to the Samsung Combined Systems Programming Manual for details).
Read Installation Procedure
, below.
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