EVEREX SYSTEMS, INC.
EMAC-MD1200 (EV-936)
Card Type | Modem (asynchronous) |
Chipset | Unidentified |
I/O Options | Speakerphone |
Maximum Data Rate | 1200bps |
Data Modulation | Bell 103A/212A ITU-T V.21, V.22 |
Error Correction/Compression | None |
Data Bus | Serial |

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 commands on low DTR; auto-answer is disabled | SW1/1 | On |
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 |
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 jack | SW1/7 | Off |
Modem is connected to RJ-12 or RJ-13 jack | SW1/7 | On |
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 1200bps |
HS | Red | Off | Modem is operating at 300bps |
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 |
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. |
Proprietary AT Command Set
TRANSMIT EQUALIZATION | |
Type: | Configuration |
Format: | AT [cmds] Un [cmds] |
Description: | Selects how much transmit equalization the modem will use. |
Command | Function |
U0 | Modem will use the average amount of transmit equalization. |
U1 | Modem will use the maximum amount of transmit equalization. |
í U2 | Modem auto-detects correct amount of transmit equalization during handshaking. |
See EVEREX SYSTEMS, INC EMAC-MD2400 (EV-945) for a full command summary.