ADTRAN
TSU LT
Card Type | T1 CSU/DSU |
Chip Set | Unidentified |
I/O Options | V.35 DTE port, test jack - in, test jack - out, test jack - monitor , RJ-48 control ports (2), T1 network interface via RJ-48, power |
T1 Data Rate | 1.544Mbps |
Line Coding | AMI, B8ZS |
Framing | D4, ESF |
Data Bus | External |

CONNECTIONS | |||
Function | Label | Function | Label |
T1 network port (RJ-48) | CN1 | Control port - chain out (RJ-48) | CN6 |
Test jack - in | CN2 | V.35 DTE port | CN7 |
Test jack - out | CN3 | Power | CN8 |
Test jack - monitor | CN4 | Power switch | SW1 |
Control port - chain in (RJ-48) | CN5 | ||
DIAGNOSTIC LED(S) | |||
LED | Color | Status | Condition |
PWR | Unidentified | On | Power is on |
PWR | Unidentified | Off | Power is off |
ERR | Unidentified | On | Error has been detected on network |
ERR | Unidentified | Off | Error has not been detected on network |
ALM | Unidentified | On | Open loop, loss of frame synchronization, dial backup mode, or problem with dial backup line alarm condition detected on network |
ALM | Unidentified | Off | Open loop, loss of frame synchronization, dial backup mode, or problem with dial backup line alarm condition not detected on network |
TST | Unidentified | On | Device is conducting a test |
TST | Unidentified | Off | Device is not conducting a test |
TD | Unidentified | On | Data is being transmitting from DTE |
TD | Unidentified | Off | Data is not being transmitting from DTE |
RD | Unidentified | On | Data is being received from network |
RD | Unidentified | Off | Data is not being received from network |
RS | Unidentified | On | RTS signal high |
RS | Unidentified | Off | RTS signal low |
CS | Unidentified | On | CTS signal high |
CS | Unidentified | Off | CTS signal low |