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Site planning

Prior to deploying a base station and installing repeaters at a site, you must ensure that the site is prepared to support the D100 and its DECT equipment. You must choose a location for the base station that is central to the users and the coverage area. The best method to determine the location of the DECT equipment is to use a floor plan. See Using a floor plan.

You can perform a DECT site survey using the handset to confirm that the DECT RF spectrum is not already fully in use by other equipment in the area. See Performing a DECT site survey and Performing a base station survey.

Empty site survey results differ from those of the same site once occupied. Perform the survey during normal business hours in order to assess the areas of usage and the effect of operating and moving equipment.

Repeater installation

If you want to extend the range of the base station by using repeaters, you require repeaters for each base station in use. You should register repeaters prior to deployment to avoid unnecessary travel between the base station and the repeater after the repeater is mounted.

The system supports handset roaming and hand-off between a base station and its repeaters. A repeater must be within the cell radius of the base station to which the repeater registers, and subsequent linked repeaters must be within the cell radius of the previous repeater.

A repeater can handle up to four channels, and you can register up to six repeaters to each base station. Note that a chain of linked repeaters is also limited to four channels, since all channels are carried by the first repeater in the chain.

You must place the repeaters in a location that maximizes the number of available channels, while placing the initial repeater within the cell radius of its base station. Note that you can only link up to three repeaters in a row and that each repeater must be within the cell radius of the other repeater.

Repeater installation scenarios

Obvious causes of signal problems

The base station and its repeaters must be no closer than 17 feet (5 meters) from other DECT base stations and repeaters, including other D100s on the same IP Office.

The repeaters registered to a particular D100 base station must be at least 35 feet (10 meters) from the base station, and 35 feet (10 meters) from other repeaters. This range limitation is particularly important in multi-floor deployments.

The following can also cause signal problems:
  • Metal surfaces

  • Concrete thickness greater than three feet (one meter)

  • Windows with reflective film or specialized glass produce increased signal reflection and reduced signal pass-through.

  • Wire meshes and grills with apertures of less than 4cm (1.5 inches) obstruct signals as effectively as continuous sheet metal.

  • Fire doors can block the signal. In multi occupancy buildings, such as hotels, the high number of fire doors might be a problem.

  • Stairwells, such as in modern office buildings, frequently combine concrete building supports, fire doors, and the intervening floor material. This can be especially problematic.

  • Screened rooms, such as those typically found in offices involved with TV, video, and radio production, can cause signal interference.