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Input Voltage Range: 100
～
240V
Output different Direct Currents: -70 for ringing and off-hook; -24V for talking battery
；
+5V for ringing SLIC
；
3.3V
for logic device.
Before connecting to the power outlet, it is suggested that tri-phase power outlet be used and ground be properly
connected.
Please follow the procedure when connecting to the power source
：
Step 1: Turn the switch for the power outlet to OFF position.
Step 2: Use the power cable in the shipping package to connect power input connect on the rear end of GT48
and plug the other end to the power outlet of 110V or 220V.
Step 3: Turn the switch to ON position.
Step 4: Check to see if the PWR LED indicator is lit. If PWR LED is lit, everything is normal. If not, repeat Steps 1
to 3.
Note: If repeated power up fails, please contact customer support. Do not attempt to open GT48 to fix any
problems.
4.8 Final Checks after Installation
After installing GT48 and before it is powered on, please make sure of the following:
¾
There is ample air space around GT48 for heat exhaustion.
¾
The shelf and GT48 is securely stable and properly grounded.
¾
Power cord is standard and made with safety approvals.
¾
Recheck all the other cables and wires.
Note: It is very important to recheck all the installation work to ensure GT48 would function properly and trouble
free.