ASCOM Ascotel 2025 System Manual page 681

ascom Ascotel 2025/2045/2065
DECT Radio Unit with Indoor Supply
approx. 30% of energy
Fig. 3.21: Optimum positioning of the DECT radio unit indoors
The following principles are to be observed when installing DECT radio units
indoors:
• In indoor supply install the radio units on inner walls rather than outdoor walls.
• Ceiling mounting can also be considered.
• Do not install in the immediate vicinity of cable ducts, metal cabinets and other
large metal objects. They obstruct transmission or can result in crosstalk. Main-
tain a distance of more than > 50 cm!
• Connecting line between PBX and DECT radio unit:
– Crosstalk can occur here if they are laid in parallel with mains feeder lines
inside cable ducts (e.g. engineering workshops). This must be taken into
account when choosing the cable and the cable route.
• Fluorescent lighting generates wide-band noise and can affect radio transmis-
sion.
• RF interference fields: PCs and other electronic equipment can affect radio
transmission in the vicinity either intermittently or permanently.
• Radio units and handsets generate pulsed RF signals. These can affect sensitive
electronic equipment (control systems, measuring sensors, sensors, diagnostics
equipment on intensive-care wards in hospitals, etc.) permanently or temporar-
ily.
3.50 Planning DECT Systems
becomes dispersed
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