ADC KENTROX DATASMART MODELS 7856X, 7876X Card Type T1 CSU/DSU Chipset Unidentified T1 Transfer Rate 1.544Mbps T1 Protocol Unidentified Frame Type Unidentified Data Bus Serial [Image] CONNECTIONS Function Label Function Label Monitor receive CN1 V.35 serial data port CN8 equalization in jack 1 Monitor receive network CN2 V.35 serial data port CN9 out jack 2 Monitor monitor jack CN3 V.24 DCE serial CN10 control port Monitor transmit CN4 V.24 DTE serial CN11 equalization out jack control port Monitor transmit network CN5 AC or DC power in CN12 in jack (depends on model) Monitor transmit monitor CN6 T1 line out CN13 jack Auxiliary jack (see CN7 Alarm cutoff switch S3 pinout below) CN1 PINOUT Function Pin Function Pin Positive external clock in 1 Not used 6 Negative external clock in 2 Alarm signal common 7 Chassis ground 3 Normally open alarm 8 contact Signal ground 4 Normally closed alarm 9 contact Unbalanced external clock 5 in THUMBWEEL FUNCTION SELECTION Function S1 S2 S3 Reset loopback tests Position 0 Pushed Not pushed Begin remote line loopback Position 1 Pushed Not pushed test Unidentified Position 2 Pushed Not pushed Reset to factory defaults and Position 3 Pushed for Pushed for switch settings 2 sec. 2 sec. Unidentified Position 3 Pushed Not pushed Begin near-end line loopback Position 4 Pushed Not pushed test Begin near-end payload Position 5 Pushed Not pushed loopback test Send QRST test code Position 8 Pushed Not pushed Send 3 in 24 test code Position 9 Pushed Not pushed Note:S2 and S3 must always be held for at least one-half of one second for the above functions to take effect. DIAGNOSTIC LED(S) LED Color Status Condition TXD1 Yellow On Data port 1 is receiving data from network TXD1 Yellow Off Data port 1 is not receiving data from network RXD1 Yellow On Data port 1 is transmitting data to network RXD1 Yellow Off Data port 1 is not transmitting data to network CTS1 Yellow On Data port 1 CTS is high CTS1 Yellow Off Data port 1 CTS is low RTS1 Yellow On Data port 1 RTS is high RTS1 Yellow Off Data port 1 RTS is low TXD2 Yellow On Data port 2 is receiving data from network TXD2 Yellow Off Data port 2 is not receiving data from network RXD2 Yellow On Data port 2 is transmitting data to network RXD2 Yellow Off Data port 2 is not transmitting data to network CTS2 Yellow On Data port 2 CTS is high CTS2 Yellow Off Data port 2 CTS is low RTS2 Yellow On Data port 2 RTS is high RTS2 Yellow Off Data port 2 RTS is low DATA Green On Valid data signal detected on T1 interface DATA Green Blinking Network Set, Reset, or Test code detected on T1 interface DATA Green Off No valid signal detected on T1 interface CV Red On Code Violation error detected on T1 interface CV Red Off Code Violation error not detected on T1 interface LOS Red On Loss Of Signal condition detected on T1 interface LOS Red Off Loss Of Signal condition not detected on T1 interface OOF Red On Signal is out of frame synchronization on T1 interface OOF Red Off Signal is not out of frame synchronization on T1 interface DIAGNOSTIC LED(S) (CON’T) LED Color Status Condition AIS Red On Alarm Indication Signal condition detected on T1 interface AIS Red Blinking Alarm Indication Signal being transmitted to T1 interface AIS Red Off Alarm Indication Signal condition not detected on T1 interface YEL Yellow On Remote Yellow Alarm condition detected on T1 interface YEL Yellow Blinking Local Yellow Alarm condition detected on T1 interface YEL Yellow Off Yellow Alarm condition not detected on T1 interface PWR Green On Power is on PWR Red On Self-test failed PWR Red Blinking Serious problem has occurred PWR N/A Off Power is off LOOP Yellow On Local loopback test in progress LOOP Yellow Blinking Remote loopback test in progress LOOP Yellow Off Loopback test not in progress SEND Yellow On Test code being sent SEND Yellow Blinking Remote loopback test may be in progress but cannot be verified SEND Yellow Off Test code not being sent ALM Red On Alarm condition detected and awaiting user intervention ALM Green On Alarm condition detected; user intervention in progress ALM Red Blinking Serious problem has occurred ALM N/A Off Alarm condition not detected