During the implementation of a Branch Session Manager, three key components need to be administered. Firstly, the Branch Session Manager Instance is essential as it constitutes the actual instance that handles the session management functions. Secondly, an Entity Link between the Branch Session Manager and another entity, such as a Survivable CM, ensures communication paths and redundancy. Thirdly, the SIP Entity is crucial as it defines the SIP-related configurations and end-points necessary for session management and integration within the network. These components collectively ensure a robust and functional deployment of the Branch Session Manager.