GDK-100
DIGITAL KEY TELEPHONE SYSTEM
57
3.3.3 RGU
Installation
The Ring Generator Unit is needed in the BKSU or SBKSU if SLIB24, SLIB48,SLIBII, and/or DSIB are to be
installed, to provide Ring voltage and Message Wait Source. According to the installation site, two types of
RGUs are available; External, Internal.
The external RGU is fixed with the two screws provided, on the wall outside the KSU and is connected to
CN12 (marking on PCB) connector on the system back-plane of Basic KSU or CN9 of Small Basic KSU. The
internal RGU is fixed on the bottom side panel with the two screws provided, inside the BKSU or SBKSU and
is connected to CN12 (marking on PCB) connector on the system back-plane of Basic KSU or CN9 of Small
Basic KSU.
See figure 3.3.3.
A corresponding cable for connecting between external /internal RGU and BKSU/SBKSU is provided with
RGU in the same package.
See Figure 3.3.5 for connection earth cable.
External
RGU
Backplane
PSU
Slot
Internal
RGU
BKSU or SBKSU
EKSU
CN12 in BKSU
CN9 in SBKSU
Figure 3.3.3
The installation of GDK-100 RGU