Panasonic KX-HTS824 Getting Started page 36

3.1.1 Before Installation
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We recommend parallel-connecting the SLT to an Analog Trunk to serve as an emergency phone in
times of power failure or equipment failure.
Preparing the Network Environment
Be sure to prepare your network's environment for the installation of the PBX according to the intended PBX
networking configuration.
36 Getting Started
Analog Trunk
PBX
SLT