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Figure 2-3 Switching Power Supply Module Physical Diagram
The high performance GT48 switching power supply module is specifically designed with AC input and multiple
DC output functions. A single module provides the ample power for a full loaded GT48 system. As an option,
uses can select dual redundant power supply modules. The power module supports the load sharing operation
mode.
The GT48 switching power supply module inputs 100v to 240 v AC voltage and output several DC voltages
：
¾
-70V for ringing and off-hook
¾
-24V for talking battery
¾
+5V for ringing SLIC
¾
3.3V for logic devices
GT48 switch power supply module is hot swappable. GT48 can maintain normal operation when a user adds,
deletes, and exchanges a power module for maintenance in a live system.Table2-7 shows the pin assignments
for DC outputs.
Table2-7 Pin Assignments for the DC Outputs
Pin
No. 2
4 6 8 10
Description -70V/0.5A
-24V/1.5A 5V/1A
3.3V/5A
Description
GND
GND GND GND GND
Pin
No. 1
3 5 7 9