Panasonic ICX Manual

Section 700 - Operation

Chapter 3. System Features

ICX-45-700

ICX (International) issued June 2000

 59

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Up to four SLTs can be connected to one PFU.

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For added protection against power outages, backup batteries can be installed in the System. 
Backup batteries provide full telephone service and system features to all System extensions for 
a limited amount of time. With maximum traffic, the backup batteries last up to 30 minutes in the 
ICX.

The System allows you to change most circuit cards, programming, and many other maintenance 
features while the System is powered on and operating. Very few operations require the System to be 
powered down or out of service. The System therefore continues to operate without interruption for 
most maintenance functions. 

A limited number of items such as the replacement of some common control circuit cards requires the 
system to be powered down.

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The dealer may program the System either by using:

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A digital key telephone equipped with display

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A PC-Based Customizing Tool

The System can be fully programmed from an extension telephone equipped with 12 FF keys and a 
display. While major system configuration changes may be more easily performed using a PC 
programmer, all programming is available via a telephone. This is especially useful for minor changes 
to the system configuration.

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