Adtran BCU 1200373L2

The TA 850 BCU is a common module plug-in unit designed for the TA 850. The BCU, with a built-in CSU, provides all control functions for the TA 850 common units and all individual access modules.

A faceplate ADMIN DB-9 provides access for a VT100 terminal for screen menu provisioning, and bantam test jacks provide transmit and receive monitoring. An additional TEST DB-9 provides timing for DS0 test equipment. A network LED shows status information for the network T1.

The unit comprises a main circuit board and daughter card and inserts directly into the BCU slot on the TA 850 shelf. An 8-position DIP switch is mounted on the daughter card and is used for T1 provisioning and clocking.