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IP LDK-20 Installation Manual Introduction
5
1.3 System Components
ITEM OPTION BOARD DESCRIPTION
KSU
Key Service Unit
PSU
Power Supply Unit, 90W
MBUB
Main Board Unit (2BRI, 4DKT, 2DKT/SLT, and 2SLT)
CO boards Central Office Line interface boards (LCOB, STIB,CBIB)
Main
Board
EXT boards Extension boards (DTIB, SLIB)
LCOB
Loop Start CO Interface, 4 lines
PRU4 Polarity Reversal detection Unit
PRCPTU4 Polarity Reversal & Call Progress Tone detection Unit
CPCU4
Caller-ID(FSK), Polarity Reversal & Call Progress Tone
detection Unit
CBIB
Loop Start CO Interface, 2 lines
Basic Rate(Only T) Interface Board, 1 line (2 channels)
PRU2 Polarity Reversal detection Unit
PRCPTU2 Polarity Reversal & Call Progress Tone detection Unit
CPCU2
Caller-ID(FSK), Polarity Reversal & Call Progress Tone
detection Unit
CO Line
Boards
STIB
ISDN Basic Rate (S/T) Interface Board, 2 lines (4channels)
DTIB4
Digital Terminal Interface Board, 4 ports
DTIB8
Digital Terminal Interface Board, 8 ports
SLIB4
SLT Interface (+36V Feed) Board, 4ports
Extension
Boards
SLIB8
SLT Interface (+36V Feed) Board, 8ports
VMIBE
Enhanced Voice Mail Interface Board, 4 channels
AAFBE
Enhanced Auto Attendant Function Board, 3 channels
LANU
LAN interface Unit (10Mbase-T only)
Other
Boards
MODU
MODEM unit (33Kbps)
Voice over Internet protocol interface module (4 channels)
VOIM
VOIU Voice over Internet protocol interface unit.(4 channels)
SLIM
SLT Interface (+36V Feed) module, 8ports
Expansion
Modules
DTIM
Digital Terminal Interface module, 8 ports