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# ADTRAN
DSU III DBU
Card Type Dial Backup DSU
Chip Set Unidentified
I/O Options 25-pin DTE ports (2), V.35 DTE port, dial
backup port (RJ-48), dedicated network port
(RJ-48), power
Maximum Data Rate 64Kbps
ISDN Rate 64Kbps
ISDN Modulation HDLC, PPP
Protocol
Line Coding 2B1Q
Data Bus External
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|------------------------------------------------------------|
| Dedicated network port - | CN1 | V.35 DTE | CN5 |
| line 1 | | port | |
|------------------------------+---------+-------------+-----|
| Dial backup port - line 2 | CN2 | Power | CN6 |
|------------------------------+---------+-------------+-----|
| 25-pin DTE port - auxiliary | CN3 | Power | SW1 |
| | | switch | |
|------------------------------+---------+-------------+-----|
| 25-pin DTE port - primary | CN4 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAGNOSTIC LED(S) |
|------------------------------------------------------------|
| LED | Color | Status | Condition |
|-----+--------------+--------+------------------------------|
| RS | Unidentified | On | RTS signal high |
|-----+--------------+--------+------------------------------|
| RS | Unidentified | Off | RTS signal low |
|-----+--------------+--------+------------------------------|
| CS | Unidentified | On | CTS signal high |
|-----+--------------+--------+------------------------------|
| CS | Unidentified | Off | CTS signal low |
|-----+--------------+--------+------------------------------|
| 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 |
|-----+--------------+--------+------------------------------|
| CD | Unidentified | On | Frame synchronization is |
| | | | established. Device is ready |
| | | | to transmit/receive data |
|-----+--------------+--------+------------------------------|
| CD | Unidentified | Off | Frame synchronization is not |
| | | | established. Device is not |
| | | | ready to transmit/receive |
| | | | data |
|-----+--------------+--------+------------------------------|
| 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 |
+------------------------------------------------------------+
+---------------------------------------------------------+
| SUPPORTED COMMAND SET |
|---------------------------------------------------------|
| Basic AT Commands |
|---------------------------------------------------------|
| AT, A/ |
|---------------------------------------------------------|
| A, E, H, O, Q, V |
|---------------------------------------------------------|
| &C, &D, &F, &K, &L, &Q, &R, &S, &V,&X, &Z |
|---------------------------------------------------------|
| Extended AT Commands |
|---------------------------------------------------------|
| \N, \T |
|---------------------------------------------------------|
| %A, %C, |
|---------------------------------------------------------|
| |
|---------------------------------------------------------|
| Note: See MHI Help File for full command documentation. |
+---------------------------------------------------------+
+------------------------------------------------------------+
| NON-STANDARD COMMAND SET |
|------------------------------------------------------------|
| Basic AT Commands |
|------------------------------------------------------------|
| Z |
|------------------------------------------------------------|
| Extended AT Commands |
|------------------------------------------------------------|
| %B, %K, %P, %P=x, %P>x, %R, %T |
|------------------------------------------------------------|
| _A, _B, _C, _D, _E, _F, _G, _H, _I, _J, _K, _L, _N=xx, _P, |
| _RR, _S=x, _T, _X, _Y |
|------------------------------------------------------------|
| |
|------------------------------------------------------------|
| Note: Full documentation is unavailable for non-standard |
| AT commands |
+------------------------------------------------------------+
TEST COMMANDS
+------------------------------------------------------------+
| TEST MODES |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Tn |
|--------------+---------------------------------------------|
| Description: | Selects test options |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &T0 | End current test |
|--------------+---------------------------------------------|
| &T1 | Begin local analog loopback test |
|--------------+---------------------------------------------|
| &T3 | Begin local digital loopback |
|--------------+---------------------------------------------|
| &T6 | Request remote digital loopback |
|--------------+---------------------------------------------|
| &T7 | Request remote digital loopback and |
| | self-test |
|--------------+---------------------------------------------|
| &T8 | Begin local analog loopback and self-test |
|--------------+---------------------------------------------|
| &T9 | Begin local self-test |
|--------------+---------------------------------------------|
| &T10 | Begin local DTE and anolog loopback test |
|--------------+---------------------------------------------|
| &T11 | Begin local analog loopback test |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TEST PATTERNS |
|------------------------------------------------------------|
| Type: | Immediate |
|------------------+-----------------------------------------|
| Format: | AT [cmds] _Tn |
|------------------+-----------------------------------------|
| Description: | Selects test pattern options |
|------------------+-----------------------------------------|
| Command | Function |
|------------------+-----------------------------------------|
| _T0 | Begin test using 2047 pattern |
|------------------+-----------------------------------------|
| _T1 | Begin test using 511 pattern |
|------------------+-----------------------------------------|
| _T2 | Begin stress test using pattern #1 |
|------------------+-----------------------------------------|
| _T3 | Begin stress test using pattern #2 |
|------------------+-----------------------------------------|
| _T4 | Begin stress test using pattern #3 |
|------------------+-----------------------------------------|
| _T5 | Begin stress test using pattern #4 |
|------------------------------------------------------------|
| Note: Commands must be used in conjuction with T7 or T8 to |
| select analog or remote test pattern. |
+------------------------------------------------------------+