Fuse <-> BSC ERC20 bridge is used to relay the ERC20 tokens between Fuse and Binance Smart Chain networks.
This bridge is two layer bridge. In the base level the Arbitrary Message Bridge (AMB) is responsible for relaying messages between the networks. On top of the AMB, the pluggable mediators implement a contract logic of token relaying of various assets. More info https://docs.tokenbridge.net/amb-bridge/about-amb-bridge.
The BSC bridge is a restricted bridge, meaning that only the Fuse team can add new tokens to the bridge. This is done because the new tokens needs to get associated manually with the tokens on the Fuse network.