4 system components – LG GDK-20W User Manual
Page 13
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM
15
2.4 SYSTEM COMPONENTS
Item
Slot
Position
Circuit
Number
Description Remark
GDK-20W KSU(MBU)
4DKT + 2SLT + 1 WTI
DVIB
1
2
Digital Voice Interface
DVIBE
1
2
Digital Voice Interface +
DTMF Receiver 2EA
LCOB4
2,3
4
Loop Start CO Interface
PRU4, PRCPTU
LCOBA
2,3
2
Loop Start CO Interface
PRU4, PRCPTU
PRU4 LCOB4/
LCOBA
4
Polarity Detect 4 ports
PRCPTU4 LCOB4/
LCOBA
4
Polarity Detect 4 ports +
Call Progress Tone Detect 4 ports
LCOB
2,3
2
Loop Start CO Interface
LCOBE(SP)
2,3
2
Loop Start CO Interface
(Call Progress Tone Detect 2 ports)
LCOBE(w/PRU) 2,3
2
Loop
Start CO Interface
(Polarity Detect 2 ports)
LCOB2
2,3
4
Loop Start CO Interface
STIB
2,3
1(2B)
ISDN 1So/To Interface
STIB2
2,3
2(4B)
ISDN 1So/To + 1To Interface
PMU
4
Program Module Unit
WTIB
5
2
Wireless Terminal Interface(2 WTI)
MFB
6
Battery Changing, RS-232C, Auto FAX
DVEU DVIB/
DVIBE
Voice Memory Expansion Unit