11
1. ABT-xCtrLine-4 control card
2. Local audio bus outputs for 4 line control card operation
3. Logic inputs connector
4. Logic outputs connector
5. Audio I/O connector
6. Auxillary power outputs
7. Temperature sensor input jack
8. Main battery connector
9. Two ABT-xCtrLine-4 control cards
10. Four ABT-xCtrLine-2 control cards
11. Four ABT-xCtrLine-44 control cards