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# ASTROCOM CORPORATION
NX1
Card Type T1 CSU/DSU
Chipset Unidentified
T1 Transfer Rate 56Kbps x 24/64Kbps x 24
T1 Protocol AMI, B8ZS
Frame Type D4, SF, ESF
Data Bus Serial
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|---------------------+-------+----------------------+-------|
| LEFT button | BT1 | T1 line out (Network | CN3 |
| | | Interface) | |
|---------------------+-------+----------------------+-------|
| ENTER button | BT2 | T1 line in (Terminal | CN4 |
| | | Interface) | |
|---------------------+-------+----------------------+-------|
| RIGHT button | BT3 | Serial control port | CN5 |
|---------------------+-------+----------------------+-------|
| AC power in | CN1 | LCD display | LCD |
|---------------------+-------+----------------------+-------|
| V.35, RS-422, or | CN2 | Power switch | SW1 |
| RS-449 serial data | | | |
| port | | | |
|------------------------------------------------------------|
| Note:The type of serial port CN2 is determined by |
| which daughtercard is installed in the unit. No |
| further information about the daughtercard is |
| available. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAGNOSTIC LED(S) |
|------------------------------------------------------------|
| LED | Color | Status | Condition |
|-----+--------------+--------+------------------------------|
| RED | Unidentified | On | T1 signal has been out of |
| | | | frame for more than 2.5 |
| | | | seconds |
|-----+--------------+--------+------------------------------|
| RED | Unidentified | Off | T1 signal has not been out |
| | | | of frame for more than 2.5 |
| | | | seconds |
|-----+--------------+--------+------------------------------|
| YEL | Unidentified | On | Yellow alarm signal detected |
|-----+--------------+--------+------------------------------|
| YEL | Unidentified | Off | Yellow alarm signal not |
| | | | detected |
|-----+--------------+--------+------------------------------|
| AIS | Unidentified | On | All Ones Signal detected |
|-----+--------------+--------+------------------------------|
| AIS | Unidentified | Off | All Ones Signal not detected |
|-----+--------------+--------+------------------------------|
| LOS | Unidentified | On | Loss of Signal condition |
| | | | detected for more than 150ms |
|-----+--------------+--------+------------------------------|
| LOS | Unidentified | Off | Loss of Signal condition not |
| | | | detected for more than 150ms |
|-----+--------------+--------+------------------------------|
| SES | Unidentified | On | Large quantity of errors |
| | | | detected in the last second |
|-----+--------------+--------+------------------------------|
| SES | Unidentified | Off | Small quantity of errors |
| | | | detected in the last second |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAGNOSTIC LED(S) (CON'T) |
|------------------------------------------------------------|
| LED | Color | Status | Condition |
|------+--------------+--------+-----------------------------|
| T1A | Unidentified | On | Valid signal detected on T1 |
| | | | network interface |
|------+--------------+--------+-----------------------------|
| T1A | Unidentified | Off | Valid signal not detected |
| | | | on T1 network interface |
|------+--------------+--------+-----------------------------|
| DTEA | Unidentified | On | Valid signal detected at |
| | | | DTE |
|------+--------------+--------+-----------------------------|
| DTEA | Unidentified | Off | Valid signal not detected |
| | | | at DTE |
|------+--------------+--------+-----------------------------|
| DS1A | Unidentified | On | Valid signal detected on T1 |
| | | | terminal interface |
|------+--------------+--------+-----------------------------|
| DS1A | Unidentified | Off | Valid signal not detected |
| | | | on T1 terminal interface |
|------+--------------+--------+-----------------------------|
| T1B | Unidentified | On | T1 network interface in |
| | | | test mode |
|------+--------------+--------+-----------------------------|
| T1B | Unidentified | Off | T1 network interface not in |
| | | | test mode |
|------+--------------+--------+-----------------------------|
| DTEB | Unidentified | On | DTE in test mode |
|------+--------------+--------+-----------------------------|
| DTEB | Unidentified | Off | DTE not in test mode |
|------+--------------+--------+-----------------------------|
| DS1B | Unidentified | On | T1 terminal interface in |
| | | | test mode |
|------+--------------+--------+-----------------------------|
| DS1B | Unidentified | Off | T1 terminal interface not |
| | | | in test mode |
+------------------------------------------------------------+