TSML37A

 與添加新的基站收發器（BTS）相比，Penta-band幹線放大器旨在提供更具成本效益的解決方案，以擴展信號覆蓋範圍並改善Penta-band系統中的通信質量。而且它易於安裝和維護，可以幫助運輸公司快速退貨。中繼放大器充當BTS與分佈式天線之間的中繼。它通過耦合器從室內配電系統的中繼線接收低功率信號，將其線性放大，然後通過電纜將其重新傳輸到天線配電系統。並且移動信號也被放大並經由相反的方向重發到BTS。

The Penta-band Trunk Amplifier is designed to provide a more cost-effective solution than adding a new Base Transceiver Station (BTS) to extend signal coverage and to improve communication quality in Penta-band system. And its easy installation and maintenance can help carrier get fast return. The Trunk Amplifier is working as a relay between the BTS and distributed antennas. It receives the low-power signal from Trunk line of indoor distribution system via the coupler, linearly amplifies the signal and then retransmits it via the cables to the antenna distribution system. And the mobile signal is also amplified and retransmitted to the BTS via the opposite direction.