2-15OFFICESERV 5000 SERIES KEYSET DAUGHTERBOARDS[DS-5014D, DS-5021D and DS-5038S Keysets Only]DS-5014D, DS-5021D and DS-5038S keysets support one of three different types ofdaughterboards installed on them to enhance operation or to provide an additional local portdepending on the type of daughterboard.KDB-Digital Line Interface (KDB-D)If your keyset is connected to a Digital Line Interface (DLI) port that supports2B+D operation, you may install a daughterboard that provides a Digital LineInterface (DLI) port for connection of a digital station device such as a keysetor 64 button add-on module.KDB-Single Line Interface (KDB-S)If your keyset is connected to a Digital Line Interface (DLI) port that supports2B+D operation, you may install a daughterboard that provides a Single LineInterface (SLI) port for connection of a standard telephone device such as acordless phone.KDB-Full Duplex (KDB-F)The standard speakerphone mode of operation for 2-line LCD keysets is “halfduplex”. This means that you cannot transmit and receive speech at the sametime. Adding an KDB-F to your keyset will convert the speakerphone into fullduplex mode, enhancing its operation. In addition, the KDB-F may have up tothree external microphones attached to it for conference room typeapplications. These microphones require an “EXTMIC” key programmed onthe keyset to activate or deactivate them.DCS SERIES (EURO) KEYSETSLCD 24B Keyset (Figure 2–11)y 32-character display (2 x 16) with threeassociated soft keys and a scroll keyy 24 programmable keys (16 with tri-colouredLEDs)y Eight fixed-function keysy Built-in speakerphoney Volume Up/Down keys for digital control ofspeaker, handset and ringer volumesy Eight selectable ring tonesy Desk- or wall-mountedFigure 2–11 LCD 24B Keyset