The Tower Mount Booster (TMB) is designed to expand signal coverage through enhancing the uplink receiving sensitivity in the area where call drops and handoff failures happen frequently.

It is installed on the top of telecommunication tower and below the BTS antenna to amplify the mobile signal via a low-noise amplifier before the signal is transmitted to the BTS.

As per the working method, we have 4 options of TMB:

Simplex TMB: only amplify uplink signal and no pass through for downlink signal Learn more	Duplex TMB: only amplify uplink signal and downlink signal can directly pass through Learn more	Bi-Directional TMB: amplify both uplink and downlink signal Learn more
Bi-Directional TMB (MCPA): can amplify signal on multiple channels with better IM3 performance Learn more

See the overview of Signal Booster here.