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Chapter 2
Hardware Descriptions
iDCS SERIES KEYSET DAUGHTERBOARDS
[28D and 18D Keysets Only]
iDCS 28D and18D keysets support one of three different types of daughterboards installed
on them to enhance operation or to provide an additional local port depending on the type of
daughterboard.
iDCS KDB-Digital Line Interface (FKDBD)
If your keyset is connected to a Digital Line Interface (DLI) port that supports
2B+D operation, you may install a daughterboard that provides a Digital Line
Interface (DLI) port for connection of a digital station device such as a keyset or
64 button add-on module.
iDCS KDB-Single Line Interface (FKDBS)
If your keyset is connected to a Digital Line Interface (DLI) port that supports
2B+D operation, you may install a daughterboard that provides a Single Line
Interface (SLI) port for connection of a standard telephone device such as a
cordless phone.
iDCS 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 applications.
These microphones require an “EXTMIC” key programmed on the keyset to
activate or deactivate them.
DOOR PHONE INTERFACE MODULE (DPIM) & DOOR PHONE (Figure 2-22)
y The DPIM adapts any DLI circuit for use with the door phone unit
y Commonly used to request entry through locked doors (interior or exterior) or as a room
monitoring box (a weatherproof door phone is available for external use)
y Provides contact control to be used with a customer-provided electric door lock
y Door phone is wall-mounted
DPIM
Door Phone
Figure 2–22 Door Phone Interface Module & Door Phone