Glossary Abis Interface between Base Transceiver Station (BTS) and Base Station Controller (BSC). Abis Configuration Configuration of traffic channels (OMUSIG, TCH, TRXSIG) on Abis. Abis Protection Scheme used to provide redundant Abis Traffic across a separate path to guard against possible link failure. Automatic Connection Feature in 2G Flexi BTS Site Manager, which would allow the user to get connected to the BTS automatically once BTS Manager is launched. The parameters required for connection viz. the BTS IP Address, the port of connection and the Q1 address will be taken from the locally stored defaults. 'Automatic Connection' would be an optional feature that the user may enable or disable anytime. BBU Battery Backup Unit. The Battery Backup Unit gives a power supply in case of a temporary mains power supply breakdown. BCF Base Control Function Base Control function is a functional entity that handles common control functions e.g. main clock functions, external alarm ...