ADTRAN TSU 100 Card Type T1 CSU/DSU Chip Set Unidentified I/O Options Daughterboard connector Transfer Rate 56/64Kbps x 23 Data Bus External [Image] CONNECTIONS Function Label Function Label ENTER button B1 9 and CLEAR button B15 UP button B2 # and SHIFT button B16 DOWN button B3 RS-232/422 port CN1 CANCEL button B4 V.35 port CN2 1 and A button B5 T1 line out CN3 4 and D button B6 Test line in CN4 7 and REMOTE button B7 Test line out CN5 * and COPY button B8 Monitor test line CN6 2 and B button B9 Daisy chain in CN7 5 and E button B10 Daisy chain out CN8 8 and ALARM button B11 120V AC power CN9 0 and HOME button B12 Fuse, 1 / 2 A @ 250V R1 3 and C button B13 Power switch SW1 6 and F button B14 DIAGNOSTIC LED(S) LED Color Status Condition LED1 Red On CSU/DSU is being controlled by connected computer LED1 Red Off CSU/DSU is being controlled by front panel LED2 Green On DSU is operating normally LED2 Green Off DSU has detected an error LED3 Yellow On DSU is in test mode LED3 Yellow Off DSU is not in test mode LED4 Red On Alarm condition has occurred on DSU LED4 Red Off Alarm condition has not occurred on DSU LED5 Green On Daughterboard is operating normally LED5 Green Off Daughterboard has detected an error LED6 Yellow On Daughterboard is in test mode LED6 Yellow Off Daughterboard is not in test mode LED7 Red On Alarm condition has occurred on daughterboard LED7 Red Off Alarm condition has not occurred on daughterboard LED8 Green On CSU is operating normally LED8 Green Off CSU has detected an error LED9 Yellow On CSU is in test mode LED9 Yellow Off CSU is not in test mode LED10 Red On Error condition has occurred on CSU LED10 Red Off Error condition has not occurred on CSU LED11 Red On Alarm condition has occurred on CSU LED11 Red Off Alarm condition has not occurred on CSU