A relay transmission unit of signal from base station transceiving stand under large volume configuration includes setting up base station transceiving stand including main chassis and subchassis, setting up public frame and carrier-frequency frame for each chassis separately with multiple transceiving unit in the frame; setting up signal relay interface module on main and sub-chassis separately to be used for fulfilling clock drive and regeneration to realize time slot exchange between PCM signal of transceiving stand chassis in base station and transceiving module of the chassis and distribution of operational maintenance bus signal as well as driving and sending-receiving; signal relay interface module centralizing all the carrier frequency parts of main chassis and subchassis to be signal in-between the public parts in order to finish transparent transmission. |