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# DIAMOND MULTIMEDIA SYSTEMS, INC.
SUPRAEXPRESS 288
Modem Type Data (synchronous/asynchronous)/Fax
Maximum Data Rate 28.8Kbps
Maximum Fax Rate 14.4Kbps
Data Bus External
Fax Class Class I
Data Modulation Bell 103A/212A
Protocol
ITU-T V.21, V.22, V.22bis, V.32,
V.32bis, V.34
Rockwell V.FC
Fax Modulation ITU-T V.17, V.27ter, V.29
Protocol
Error MNP5, V.42, V.42bis
Correction/Compression
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------+----------+-----------------+---------------|
| Line out | CN1 | RS-232/422 | CN3 |
|---------------+----------+-----------------+---------------|
| Line in | CN2 | DC power | CN4 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAGNOSTIC LED(S) |
|------------------------------------------------------------|
| LED | Color | Status | Condition |
|------+--------+----------+---------------------------------|
| OH | Red | On | Modem is off-hook |
|------+--------+----------+---------------------------------|
| OH | Red | Off | Modem is on-hook |
|------+--------+----------+---------------------------------|
| RD | Red | Blinking | Modem is receiving data |
|------+--------+----------+---------------------------------|
| RD | Red | Off | Modem is not receiving data |
|------+--------+----------+---------------------------------|
| SD | Red | Blinking | Modem is transmitting data |
|------+--------+----------+---------------------------------|
| SD | Red | Off | Modem is not transmitting data |
|------+--------+----------+---------------------------------|
| PWR | Red | On | Power is on |
|------+--------+----------+---------------------------------|
| PWR | Red | Off | Power is off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SUPPORTED COMMAND SET |
|------------------------------------------------------------|
| Basic AT Commands |
|------------------------------------------------------------|
| AT, ‘+++’, ‘comma’, A/ |
|------------------------------------------------------------|
| A, B, C, D, E, F, H, L, M, N, O, P, Q, R, S, T, U, V, W, |
| X, Y, Z |
|------------------------------------------------------------|
| &A, &B, &C, &D, &F, &G, &J, &K, &L, &M, &P, &Q, &R, &S, |
| &T, &V, &W, &X, &Y, &Z |
|------------------------------------------------------------|
| Extended AT Commands |
|------------------------------------------------------------|
| \A, \B, \C, \E, \G, \J, \K, \L, \O, \Q, \T, \U, \V, \W, |
| \X, \Y, \Z |
|------------------------------------------------------------|
| %A, %L, %Q, %TT |
|------------------------------------------------------------|
| S Registers |
|------------------------------------------------------------|
| S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, |
| S16, S18, S24, S25, S26, S29, |
|------------------------------------------------------------|
| S38, S39, S46, S48, S82, S86, S90, S91, S92, S95, S99, |
| S108, S109, S110, 201 |
|------------------------------------------------------------|
| Special Commands |
|------------------------------------------------------------|
| *H, "H, "N, "O,-J, -K, -Q, )M, @M, :E, #CID, +MS? |
|------------------------------------------------------------|
| Note: See MHI Help File for full command documentation. |
+------------------------------------------------------------+
Proprietary AT Command Set
+------------------------------------------------------------+
| AUTO FALL FORWARD/FALLBACK |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %Gn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT %G1 &W <CR> |
|--------------+---------------------------------------------|
| Description: | Selects auto fall forward/fallback. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| %G1 | Fall forward/fallback disabled. |
|--------------+---------------------------------------------|
| » %G0 | Fall forward/fallback enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COMPRESSION AND ERROR CORRECTION |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT %Cn |
|--------------+---------------------------------------------|
| Example: | AT %C0 *Y1<CR> |
|--------------+---------------------------------------------|
| Description: | Selects data compression and error |
| | correction. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| %C0 | Data compression disabled. |
|--------------+---------------------------------------------|
| %C1 | Data compression enabled. |
|--------------+---------------------------------------------|
| %C2 | Data correction enabled. |
|--------------+---------------------------------------------|
| » %C3 | Data compression and correction enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CONNECT MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Nn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT \N1 DT555-1212<CR> |
|--------------+---------------------------------------------|
| Description: | Sets connect mode. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| \N0 | Normal mode enabled. |
|--------------+---------------------------------------------|
| \N1 | Direct mode enabled. |
|--------------+---------------------------------------------|
| \N2 | Reliable mode enabled. |
|--------------+---------------------------------------------|
| » \N3 | Auto-reliable mode enabled. |
|--------------+---------------------------------------------|
| \N4 | LAPM/MNP mode enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MODULATION SELECTION |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] +MS=xx,y,zzz,aaa [cmds] |
|--------------+---------------------------------------------|
| Example: | AT +MS11,1,300,28800 &W<CR> |
|--------------+---------------------------------------------|
| Description: | Sets options for active protocol. The |
| | transfer rates specified by z and a must be |
| | valid for the protocol selected. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| x=0 | V.21 |
|--------------+---------------------------------------------|
| x=1 | V.22 |
|--------------+---------------------------------------------|
| x=2 | V.22bis |
|--------------+---------------------------------------------|
| x=3 | V.23 |
|--------------+---------------------------------------------|
| x=9 | V.32 |
|--------------+---------------------------------------------|
| x=10 | V.32bis |
|--------------+---------------------------------------------|
| » x=11 | V.34 |
|--------------+---------------------------------------------|
| x=64 | Bell 103 |
|--------------+---------------------------------------------|
| x=69 | Bell 212A |
|--------------+---------------------------------------------|
| x=74 | V.FC |
|--------------+---------------------------------------------|
| y=0 | Automode disabled. |
|--------------+---------------------------------------------|
| y=1 | Auto-detect highest speed enabled. |
|--------------+---------------------------------------------|
| z, a=300 | Set minimum or maximum transfer rate at |
| | 300bps, respectively. |
|--------------+---------------------------------------------|
| z, a=1200 | Set minimum or maximum transfer rate at |
| | 1200bps, respectively. |
|--------------+---------------------------------------------|
| z, a=2400 | Set minimum or maximum transfer rate at |
| | 2400bps, respectively. |
|--------------+---------------------------------------------|
| z, a=4800 | Set minimum or maximum transfer rate at |
| | 4800bps, respectively. |
|--------------+---------------------------------------------|
| z, a=7200 | Set minimum or maximum transfer rate at |
| | 7200bps, respectively. |
|--------------+---------------------------------------------|
| z, a=9600 | Set minimum or maximum transfer rate at |
| | 9600bps, respectively. |
|--------------+---------------------------------------------|
| z, a=12000 | Set minimum or maximum transfer rate at |
| | 12000bps, respectively. |
|--------------+---------------------------------------------|
| z, a=14400 | Set minimum or maximum transfer rate at |
| | 14400bps, respectively. |
|--------------+---------------------------------------------|
| z, a=16800 | Set minimum or maximum transfer rate at |
| | 16800bps, respectively. |
|--------------+---------------------------------------------|
| z, a=19200 | Set minimum or maximum transfer rate at |
| | 19200bps, respectively. |
|--------------+---------------------------------------------|
| z, a=24000 | Set minimum or maximum transfer rate at |
| | 24000bps, respectively. |
|--------------+---------------------------------------------|
| z, a=26400 | Set minimum or maximum transfer rate at |
| | 26400bps, respectively. |
|--------------+---------------------------------------------|
| z, a=28800 | Set minimum or maximum transfer rate at |
| | 28800bps, respectively. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| REPORT INFORMATION |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] In [cmds] |
|--------------+---------------------------------------------|
| Example: | AT I1 O<CR> |
|--------------+---------------------------------------------|
| Description: | Displays modem properties. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| I0 | Reports product code. |
|--------------+---------------------------------------------|
| I1 | Reports ROM checksum result. |
|--------------+---------------------------------------------|
| I2 | Reports ROM checksum OK or ERROR |
|--------------+---------------------------------------------|
| I3 | Reports firmware version. |
|--------------+---------------------------------------------|
| I4 | Reports current command settings. |
|--------------+---------------------------------------------|
| I5 | Reports copyright information. |
|--------------+---------------------------------------------|
| I7 | Reports configuration. |
|--------------+---------------------------------------------|
| I10 | Reports modem’s optional features |
+------------------------------------------------------------+
+------------------------------------------------------------+
| RETRAIN |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %E1 [cmds] |
|--------------+---------------------------------------------|
| Example: | AT %E1<CR> |
|--------------+---------------------------------------------|
| Description: | Requests a retrain. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| %E0 | Disabled |
|--------------+---------------------------------------------|
| » %E1 | Enabled |
+------------------------------------------------------------+