Performing a DECT site survey

You can use the following procedure to confirm that the DECT RF spectrum is not fully used by other DECT equipment in the area. Perform the site survey if there is likely to be a number of other DECT systems in the area. Also, it is recommended that you perform the survey during normal site operation.

The handset can measure the RSSI of all channels within one slot. If the RSSI value calculated is under –60dBm for at least one channel, that slot is determined to be a clear slot. This process is repeated for all slots, after which the handset displays the number of clear slots.


  1. Press and hold the * and # keys and insert the battery into the handset at the same time.
  2. Depending on your place of residence:
    • Press soft key #1 to start the measurement for a North American site.

    • Press soft key #2 to start the measurement for a European site.

    The measurement occurs quickly and then the handset display shows the results. The top line of the display shows the number of clear slots, and the second line of the display shows the number of clear channels and the associated slots. For example:

    NA Clear Slot: 12 / 12

    544333444555 49 / 60

    This example indicates the following:
    • The survey has completed on a North American site.

    • All 12 slots had at least one free channel.

    • All five channels were free on slots 1, 10, 11, and 12.

    • Four channels were free on slots 2, 3, 7, 8, and 9

    • Three channels were free on slots 4, 5, and 6.


    The site should have at least 10 clear slots in order for the D100 to work properly.

  3. Press the soft key used in step 2 to restart the survey. In North America, you can press soft key 3 to continue with a base station survey. See Performing a base station survey.

    Press the On-Hook key to return the handset to normal operating mode.