Decide in advance where to install TBR or TME devices. Note the device locations and type on the floor plan. See figure below.

Floor plan with defined TBR and TME locations



Separate TBRs are useful in case SEDs are in detached obstacle areas (isolated rooms) with high damping effect, where they can hardly be reached from outside.





Planning grid

Obstacle area



Consider the following:

  • TBRs are slightly more expensive than TMEs.
  • TBRs require 230 V power and an Ethernet connection.
  • TBRs expand the Thread range via Ethernet to Thread connection, similar to WLAN access points.
  • The Thread network requires at least one TBR.
  • Max. 20 devices (SEDs and TMEs) can be connected to a single TBR.
  • TBRs render your Thread network more robust due to a direct Ethernet connection to the Northbound system. This means:
    • TMEs do not increase latency nor hops.
    • Ensure no obstacles are in the line of sight of the Edge gateway (interference, strong damping due to concrete, metal, or fire protection doors).
  • TMEs only need one 230 V power socket.
  • TMEs expand the Thread range via Thread-to-Thread connection, similar to WLAN repeaters.
  • The maximum recommended number of hops in a Thread system is 4, or 3 TMEs between a TBR and an end device. See also 'Hops between TME devices'.