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NSTALLING, POWERING, CONNECTING AND REGISTERING TERMINALS
CHAPTER 4 INSTALLATION
• Terminal power supply of the communication server is overloaded
Only use the corresponding plug-in power supply unit with FCC connector available as an option. It is
connected either to the phone itself or, when using one or more expansion key modules, on the last
expansion key module.
See also
The power available on the DSI bus depending on the line length and the wire diameter, and the power
input of the system phones are described in the chapter DSI terminal interfaces
.
Connecting the phone
1.
Setting the DSI bus address on the system phone’s underside:
– TSD1 = address switch on position 1
– TSD2 = address switch on position 2
2.
Plug the connector into the socket-outlet.
3. If the system is configured, test the operation of the system phone.
4. Label the phone as indicated in the operating instructions.
DECT radio units and cordless phones
The locations determined for the cordless phones, charging bays and radio units during the planning
phase need to be checked against the following criteria:
• Influence on radio operation
• Ambient conditions
Influences on radio operation
Radio operation is affected by the following influences:
• Outside interference (EMC)
• Obstacles in the surrounding area affect the radio characteristic
To achieve optimum conditions for radio operation, observe the following points:
• Optimum radio operation depends on the radio unit → cordless phone line of sight.
• Walls act as an obstacle to the propagation of radio waves. Losses depend on the wall thickness,
construction material and reinforcement used.
• Do not place radio units and cordless phones in the immediate vicinity of TV sets, radios, CD players
or power installations (for reasons of EMC, e.g.distribution boxes, rising power lines).
• Do not place radio units and cordless phones near X-ray installations (EMC).
• Do not place radio units and cordless phones near metal partitions.
Observe the minimum distance requirements between adjacent radio units (see Installation dis-
tances).
• Minimum distance between cordless phones for fault-free operation: 0.2 m. (The charging bays of
the Office 135 can be linked using connecting strips. However, operating several phones on inter-
connected charging bays can lead to malfunctions.)
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