Installation
149
Mitel SMB Controller
syd-0657/2.0 – R6.0 – 09.2018
4. 8. 7
DECT radio units and cordless phones
The locations determined for the cordless phones, charging bays and radio units dur-
ing 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
Fig. 63).
• 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, op-
erating several phones on interconnected charging bays can lead to malfunctions.)
• Minimum distance between charging bays with cordless phones on-hook for fault-
free operation: 0.2 m.
Ambient conditions
• When installing: Ensure convection (space for ventilation).
• Avoid excessive dust.
• Avoid exposure to chemicals.
• Avoid direct sunlight.
• See also technical data in Tab. 112.
