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# EVEREX SYSTEMS, INC.
EMAC-MD2400 (EV-945)
Card Type Modem (asynchronous)
Chipset Unidentified
I/O Options Speakerphone
Maximum Data Rate 2400bps
Data Modulation Bell 103A/212A
ITU-T V.21, V.22, V.22bis
Error Correction/Compression MNP3
Data Bus Serial
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|------------------------+-------+-------------------+-------|
| Speakerphone button | BT1 | DC power in | CN4 |
|------------------------+-------+-------------------+-------|
| Mute button | BT2 | Microphone | MIC |
|------------------------+-------+-------------------+-------|
| Telephone line out | CN1 | Volume control | R1 |
|------------------------+-------+-------------------+-------|
| Telephone line in | CN2 | Power switch | SW2 |
|------------------------+-------+-------------------+-------|
| RS-232/422 port | CN3 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Setting | Label | Position |
|-----------------------------------------+-------+----------|
| í Modem ignores DTR | SW1/1 | Off |
|-----------------------------------------+-------+----------|
| Modem disconnects and does not accept | SW1/1 | On |
| commands on low DTR; auto-answer is | | |
| disabled | | |
|-----------------------------------------+-------+----------|
| í Verbose result code format enabled. | SW1/2 | Off |
|-----------------------------------------+-------+----------|
| Numeric result code format enabled. | SW1/2 | On |
|-----------------------------------------+-------+----------|
| í Result codes enabled | SW1/3 | Off |
|-----------------------------------------+-------+----------|
| Result codes disabled | SW1/3 | On |
|-----------------------------------------+-------+----------|
| í Command echo enabled | SW1/4 | Off |
|-----------------------------------------+-------+----------|
| Command echo disabled | SW1/4 | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS (CON’T) |
|------------------------------------------------------------|
| Setting | Label | Position |
|-----------------------------------------+-------+----------|
| í Auto-answer disabled | SW1/5 | Off |
|-----------------------------------------+-------+----------|
| Auto-answer after first ring | SW1/5 | On |
|-----------------------------------------+-------+----------|
| í CD signal forced high | SW1/6 | Off |
|-----------------------------------------+-------+----------|
| CD signal normal | SW1/6 | On |
|-----------------------------------------+-------+----------|
| í Modem is connected to RJ-11 or RJ-14 | SW1/7 | Off |
| jack | | |
|-----------------------------------------+-------+----------|
| Modem is connected to RJ-12 or RJ-13 | SW1/7 | On |
| jack | | |
|-----------------------------------------+-------+----------|
| í Command set enabled | SW1/8 | Off |
|-----------------------------------------+-------+----------|
| Command set disabled | SW1/8 | On |
|-----------------------------------------+-------+----------|
| í Modem uses Bell 212A at 1200bps | SW1/9 | Off |
|-----------------------------------------+-------+----------|
| Modem uses ITU-T V.22 at 1200bps | SW1/9 | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAGNOSTIC LED(S) |
|------------------------------------------------------------|
| LED | Color | Status | Condition |
|-----+-------+----------+-----------------------------------|
| SPL | Red | On | Modem is in speakerphone mode |
|-----+-------+----------+-----------------------------------|
| SPL | Red | Off | Modem is not in speakerphone mode |
|-----+-------+----------+-----------------------------------|
| ML | Red | On | Speakerphone is muted |
|-----+-------+----------+-----------------------------------|
| ML | Red | Off | Speakerphone is not muted |
|-----+-------+----------+-----------------------------------|
| RI | Red | On | Phone is ringing |
|-----+-------+----------+-----------------------------------|
| RI | Red | Off | Phone is not ringing |
|-----+-------+----------+-----------------------------------|
| HS | Red | On | Modem is operating at 2400bps |
|-----+-------+----------+-----------------------------------|
| HS | Red | Off | Modem is operating at slower than |
| | | | 2400bps |
|-----+-------+----------+-----------------------------------|
| AA | Red | On | Auto-answer enabled |
|-----+-------+----------+-----------------------------------|
| AA | Red | Off | Auto-answer disabled |
|-----+-------+----------+-----------------------------------|
| CD | Red | On | Carrier signal detected |
|-----+-------+----------+-----------------------------------|
| CD | Red | Off | Carrier signal not detected |
|-----+-------+----------+-----------------------------------|
| 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 |
|-----+-------+----------+-----------------------------------|
| TD | Red | Blinking | Modem is transmitting data |
|-----+-------+----------+-----------------------------------|
| TD | Red | Off | Modem is not transmitting data |
|-----+-------+----------+-----------------------------------|
| TR | Red | On | DTR signal is high |
|-----+-------+----------+-----------------------------------|
| TR | Red | Off | DTR signal is low |
|-----+-------+----------+-----------------------------------|
| MR | Red | On | Power is on |
|-----+-------+----------+-----------------------------------|
| MR | Red | Off | Power is off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SUPPORTED STANDARD COMMANDS |
|------------------------------------------------------------|
| Basic AT Commands |
|------------------------------------------------------------|
| +++, ‘comma’, A/ |
|------------------------------------------------------------|
| A, B, E, F, H, L, M, O, Q, V, X, Y, Z |
|------------------------------------------------------------|
| &C, &D, &G, &L, &P, &T |
|------------------------------------------------------------|
| Extended AT Commands |
|------------------------------------------------------------|
| \B, \C, \J, \K, \N, \O, \Q, \T, \U, \V, \X, \Y, \Z |
|------------------------------------------------------------|
| %A |
|------------------------------------------------------------|
| S-Registers |
|------------------------------------------------------------|
| S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, |
| S14, S18, S21, S22, S23, S27 |
|------------------------------------------------------------|
| Note: See MHI help file for complete information. |
| |
| Not all EMAC-MD2400 modems support MNP. Those that do |
| not will not support the Extended AT Commands line. |
+------------------------------------------------------------+
Proprietary AT Command Set
+------------------------------------------------------------+
| DIAL |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] D<#>;[cmds] |
|--------------+---------------------------------------------|
| Description: | Dials the telephone number indicated |
| | according to any modifiers included in the |
| | string. |
|--------------+---------------------------------------------|
| Note: | Any combination of modifiers can be used to |
| | produce the desired dial functions in |
| | sequence. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| DP | Pulse dialing enabled. |
|--------------+---------------------------------------------|
| DR | Answer mode enabled; originate mode |
| | disabled following handshake initiation. |
|--------------+---------------------------------------------|
| DT | Tone dialing enabled. |
|--------------+---------------------------------------------|
| DW | Dialing resumed following dial tone |
| | detection. |
|--------------+---------------------------------------------|
| D, | Dialing paused for amount of time specified |
| | in S8 register. |
|--------------+---------------------------------------------|
| D! | Flash function initiated. Modem commanded |
| | to go off-hook for specified time before |
| | returning on-hook. |
|--------------+---------------------------------------------|
| D@ | Wait for Quiet Answer function enabled. |
| | Modem waits until a "quiet answer," a |
| | ring-back signal followed by silence up to |
| | the time specified in S7, is received prior |
| | to executing the rest of the dial string. |
|--------------+---------------------------------------------|
| D/ | Dialing paused for 1/8 second. |
|--------------+---------------------------------------------|
| D; | Modem returned to idle state after dialing. |
| | The semicolon can only be placed at the end |
| | of the dial command. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CALL SWITCHING |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &En [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects whether the modem will |
| | automatically disconnect a data call if the |
| | phone is picked up. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í &E0 | Call switching enabled. |
|--------------+---------------------------------------------|
| &E1 | Call switching disabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DISPLAY INFORMATION |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] In [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays information requested about the |
| | modem. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| I0 | Displays product identification code. |
|--------------+---------------------------------------------|
| I1 | Displays ROM checksum. |
|--------------+---------------------------------------------|
| I2 | Displays current connection speed, data |
| | bits, and parity. |
|--------------+---------------------------------------------|
| I3 | Displays 000 if modem is on-hook and 001 if |
| | modem is off-hook. |
|--------------+---------------------------------------------|
| I4 | Displays modem identification string |
| | (displayed in parentheses in model name |
| | header on MHI document). |
+------------------------------------------------------------+
+------------------------------------------------------------+
| HELP |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Hn [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays help on the topic indicated. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &H0 | Displays help on AT commands. |
|--------------+---------------------------------------------|
| &H1 | Displays help on S-registers. |
|--------------+---------------------------------------------|
| &H2 | Displays help on modem result codes. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SPEED CHANGE MESSAGES |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &In [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects whether the modem will send a |
| | "SPEED MISMATCH/PLEASE SET TO xxxx" message |
| | if the serial port speed is different than |
| | the line speed. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í &I0 | Speed change messages enabled. |
|--------------+---------------------------------------------|
| &I1 | Speed change messages disabled. |
+------------------------------------------------------------+