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Chapter 12 Install Companion or DECT Systems 251
Installation and Maintenance Guide
Companion Hardware Installation
The Companion hardware must be in place and configured before you can use the handsets to
connect to the Business Communications Manager. This section describes how to install the
Companion hardware components.
The base station has the option of using internal or external antennas. For most installations, the
internal antenna will be used. If you need to install external antennas, refer to “Install an external
antenna and lightning surge protection” on page 265.
Install the base station remote power interconnect (RPI) unit
The remote power interconnect unit (RPI) provides remote power for base station support. Figure
161 shows a diagram of the RPI.
Figure 161 RPI unit
Caution: The RPI unit must have the DC backup power supplied by a UL listed universal
power supply (UPS).
The UPS must have an output voltage rating of 44 to 52 V DC, with a maximum fault
current limit of 6 A to protect the RPI output wiring. If these requirements are not met, it is
necessary to use class 1 wiring.
Warning: Install the RPI units inside a building.
The AC outlet powering the RPI must be installed near the equipment and must be easily
accessible.
The length of the RPI cord, from the outside surface of the unit to the plug, must be a
minimum of 1.3 m (4.5 ft) and a maximum of 4.6 m (15 ft).