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GDK-100
DIGITAL KEY TELEPHONE SYSTEM
75
3.4.4.7 MSGU/MSGU48/MSGUII Installation
A message waiting unit can be optionally installed on a SLT interface board to light a message waiting lamp
in the SLT connected. There are 3 kinds of message waiting unit as followings according to the line voltage.
The position of Installation
The quantity of circuits
The line voltage
MSGU
SLIB24, DSIB
6 circuits
+24Vdc
MSGU48 SLIB48
6
circuits
-48Vdc
DTRU II
SLIB II
12 circuits
-28Vdc
!
Signal voltage: 90~100Vdc