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# CARDINAL TECHNOLOGIES,INC.
2400MNP (INTERNAL), 2450MNP (INTERNAL)
Card Type Modem (asynchronous)
Chip Set Unidentified
Maximum Data Rate 2400bps
Data Bus 8-bit ISA
Data Modulation Protocol Bell 103/212A
ITU-T V.21, V.22, V.22bis
Error Correction/Compression MNP5, V.42, V.42bis
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|------------------------------------------------------------|
| Line out/in | CN1 | Line in/out | CN2 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT ADDRESS |
|------------------------------------------------------------|
| Setting | IRQ | SW1/A | SW1/B | SW1/C | SW1/D |
|-------------+------+---------+---------+---------+---------|
| COM1 (3F8h) | 4 | Closed | Closed | Closed | Open |
|-------------+------+---------+---------+---------+---------|
| COM2 (2F8h) | 3 | Open | Closed | Open | Closed |
|-------------+------+---------+---------+---------+---------|
| COM3 (3E8h) | 4 | Closed | Open | Closed | Open |
|-------------+------+---------+---------+---------+---------|
| COM4 (2E8h) | 3 | Open | Open | Open | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INTERRUPT SELECTION |
|------------------------------------------------------------|
| Setting | P3 |
|-------------------------------+----------------------------|
| 2 | Pins 2 & 3 closed |
|-------------------------------+----------------------------|
| 5 | Pins 1 & 2 closed |
|-------------------------------+----------------------------|
| Disabled IRQ2 & IRQ5 | Open |
+------------------------------------------------------------+
Proprietary AT Command Set
+------------------------------------------------------------+
| ACCEPT RELIABLE MODE |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \U [cmds] |
|--------------+---------------------------------------------|
| Description: | Accept remote modem’s request for reliable |
| | mode |
+------------------------------------------------------------+
+------------------------------------------------------------+
| AUTO-RELIABLE FALLBACK CHARACTER |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %An [cmds] |
|--------------+---------------------------------------------|
| Default: | Unidentified |
|--------------+---------------------------------------------|
| Range: | 0-127 |
|--------------+---------------------------------------------|
| Unit: | ASCII |
|--------------+---------------------------------------------|
| Description: | Sets the character used as the |
| | auto-reliable fallback character |
|--------------+---------------------------------------------|
| Note: | AT%A0 will disable this function. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| AUTO-RELIABLE TIME BUFFER CONFIGURATION |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Cn [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls the handling of incoming data |
| | during auto-reliable time period |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í \C0 | Data is discarded |
|--------------+---------------------------------------------|
| \C1 | Data is buffered |
|--------------+---------------------------------------------|
| \C2 | Data is discarded; modem returns to normal |
| | mode on receiving auto-reliable fallback |
| | character. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIT MAPPED REGISTERS |
|------------------------------------------------------------|
| Register | Default |
|----------------------------+-------------------------------|
| S14 | Unidentified |
|----------------------------+-------------------------------|
| S21 | Unidentified |
|----------------------------+-------------------------------|
| S22 | Unidentified |
|----------------------------+-------------------------------|
| S23 | Unidentified |
|----------------------------+-------------------------------|
| S27 | Unidentified |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BREAK SEND |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Bn [cmds] |
|--------------+---------------------------------------------|
| Default: | 3 |
|--------------+---------------------------------------------|
| Range: | 3-9 |
|--------------+---------------------------------------------|
| Unit: | .1 second |
|--------------+---------------------------------------------|
| Description: | Sends break to modem |
+------------------------------------------------------------+
+-------------------------------------------------------------+
| BREAK TYPE |
|-------------------------------------------------------------|
|Type: |Configuration |
|------------------+------------------------------------------|
|Format: |AT [cmds] \Kn [cmds] |
|------------------+------------------------------------------|
|Description: |Configures action of break signal |
|-------------------------------------------------------------|
| Command |Break from DTE |Break from | Break | Modem |
| | | DTE | received |receives \B|
| |Reliable/Normal| |from remote| |
| | mode |Direct mode| modem | |
|---------+---------------+-----------+-----------+-----------|
| \K0 |Online command |Online |Buffers |Break sent |
| |mode enabled, |command |cleared, |to remote |
| |send no break |mode |break sent |modem and |
| |to remote modem|enabled, |to DTE |buffers |
| | |send break | |cleared |
| | |to remote | | |
| | |modem | | |
| | |immediately| | |
|---------+---------------+-----------+-----------+-----------|
| \K1 |Break sent to |Send break |Buffers |Break sent |
| |remote modem |to remote |cleared, |to remote |
| |and buffers |modem |break sent |modem and |
| |cleared |immediately|to DTE |buffers |
| | | | |cleared |
|---------+---------------+-----------+-----------+-----------|
| \K2 |Online command |Online |Break sent |Send break |
| |mode enabled, |command |immediately|to remote |
| |send no break |mode |to DTE |modem |
| |to remote modem|enabled, | |immediately|
| | |send break | | |
| | |to remote | | |
| | |modem | | |
| | |immediately| | |
|---------+---------------+-----------+-----------+-----------|
| \K3 |Send break to |Send break |Break sent |Send break |
| |remote modem |to remote |immediately|to remote |
| |immediately |modem |to DTE |modem |
| | |immediately| |immediately|
|---------+---------------+-----------+-----------+-----------|
| \K4 |Online command |Online |Break sent |Send break |
| |mode enabled, |command |with |with |
| |send no break |mode |received |transmitted|
| |to remote modem|enabled, |data to the|data |
| | |send break |DTE | |
| | |to remote | | |
| | |modem | | |
| | |immediately| | |
|---------+---------------+-----------+-----------+-----------|
| í \K5 |Send break with|Send break |Break sent |Send break |
| |transmitted |to remote |with |with |
| |data |modem |received |transmitted|
| | |immediately|data to the|data |
| | | |DTE | |
+-------------------------------------------------------------+
+------------------------------------------------------------+
| COMPRESSION |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %Cn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects data compression |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| %C0 | Data compression disabled |
|--------------+---------------------------------------------|
| í %C1 | MNP5 enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CONNECT MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Nn [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls the type of connection the modem |
| | will operate in |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| \N0 | Normal mode enabled |
|--------------+---------------------------------------------|
| í \N1 | Direct mode enabled |
|--------------+---------------------------------------------|
| \N2 | MNP reliable mode enabled |
|--------------+---------------------------------------------|
| \N3 | Auto-reliable mode enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CONVERT TO RELIABLE MODE |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Y [cmds] |
|--------------+---------------------------------------------|
| Description: | Converts to reliable mode from normal or |
| | direct mode |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAL |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] D<#> [cmds] |
|--------------+---------------------------------------------|
| Description: | Dials telephone number according to any |
| | modifiers included in the string |
|--------------+---------------------------------------------|
| Note: | Any combination of modifiers can be used to |
| | produce the desired dial functions in |
| | sequence. |
|--------------+---------------------------------------------|
| Modifier | Function |
|--------------+---------------------------------------------|
| P | Pulse dialing enabled |
|--------------+---------------------------------------------|
| R | Answer mode enabled, originate mode |
| | disabled following handshake initiation |
|--------------+---------------------------------------------|
| Sn | Dial stored telephone number n |
|--------------+---------------------------------------------|
| T | Tone dialing enabled |
|--------------+---------------------------------------------|
| W | Dialing resumed following dial tone |
| | detection |
|--------------+---------------------------------------------|
| , | Dialing paused for amount of time specified |
| | in S8 register |
|--------------+---------------------------------------------|
| ! | Modem commanded to go off-hook for |
| | specified time before returning on-hook |
|--------------+---------------------------------------------|
| @ | Wait for quiet answer |
|--------------+---------------------------------------------|
| ; | Modem returned to command state after |
| | dialing |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DISPLAY CONFIGURATION |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \S [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays current modem settings |
+------------------------------------------------------------+
+------------------------------------------------------------+
| EXTENDED RESULT CODES |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Vn [cmds] |
|--------------+---------------------------------------------|
| Description: | Select standard or extended result codes |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| \V0 | Standard result codes enabled |
|--------------+---------------------------------------------|
| \V1 | Extended result codes enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOW CONTROL |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Gn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects modem port flow control |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í \G0 | Flow control disabled |
|--------------+---------------------------------------------|
| \G1 | Flow control enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOW CONTROL TYPE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Qn [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets type of flow control used by modem |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í \Q0 | Flow control disabled |
|--------------+---------------------------------------------|
| \Q1 | XON/XOFF flow control enabled |
|--------------+---------------------------------------------|
| \Q2 | CTS flow control by DCE enabled |
|--------------+---------------------------------------------|
| \Q3 | RTS/CTS flow control enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INACTIVITY TIMER |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Tn [cmds] |
|--------------+---------------------------------------------|
| Default: | 0 |
|--------------+---------------------------------------------|
| Range: | 0-90 |
|--------------+---------------------------------------------|
| Unit: | 1 minute |
|--------------+---------------------------------------------|
| Description: | Sets the length of time that the modem does |
| | not receive information before it |
| | disconnects. |
|--------------+---------------------------------------------|
| Note: | AT\T0 will disable timer. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INITIATE RELIABLE MODE |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \O [cmds] |
|--------------+---------------------------------------------|
| Description: | Initiates reliable mode from normal or |
| | direct mode |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LINE SIGNAL QUALITY |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S100 [cmds] |
|--------------+---------------------------------------------|
| Description: | Returns a value which indicates line signal |
| | quality |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LINE SPEED |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %Nn [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls maximum DCE line speed |
|------------------------------------------------------------|
| Command | Function |
|----------------+-------------------------------------------|
| í %N0 | Enable maximum DCE speed |
|----------------+-------------------------------------------|
| %N1 | Maximum DCE speed set to 300bps |
|----------------+-------------------------------------------|
| %N2 | Maximum DCE speed set to 300bps |
|----------------+-------------------------------------------|
| %N3 | Maximum DCE speed set to 300bps |
|----------------+-------------------------------------------|
| %N5 | Maximum DCE speed set to 1200bps |
|----------------+-------------------------------------------|
| %N6 | Maximum DCE speed set to 2400bps |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LOCK SERIAL PORT |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Jn [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets operation of serial port speed |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| \J0 | Serial speed locked |
|--------------+---------------------------------------------|
| í \J1 | Serial speed follows connect speed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MAXIMUM BLOCK SIZE FOR TRANSMISSION |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \An [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets the maximum transmittable block size |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| \A0 | MNP block size is 64 characters |
|--------------+---------------------------------------------|
| \A1 | MNP block size is 128 characters |
|--------------+---------------------------------------------|
| \A2 | MNP block size is 192 characters |
|--------------+---------------------------------------------|
| í \A3 | MNP block size is 256 characters |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MNP - STREAM/BLOCK MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Ln [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects the transfer mode for MNP link |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í \L0 | Stream mode for MNP enabled |
|--------------+---------------------------------------------|
| \L1 | Block mode for MNP enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| REPORT INFORMATION |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] In [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays information requested |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| I0 | Reports modem code |
|--------------+---------------------------------------------|
| I1 | Reports ROM checksum |
|--------------+---------------------------------------------|
| I2 | Tests and reports ROM checksum |
|--------------+---------------------------------------------|
| I3 | Reports version information |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SWITCH TO NORMAL MODE |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Z [cmds] |
|--------------+---------------------------------------------|
| Description: | Switches to normal mode from MNP mode |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TEST MODES |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S16=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 0 |
|--------------+---------------------------------------------|
| Range: | 0-125 |
|--------------+---------------------------------------------|
| Unit: | Bit-mapped |
|--------------+---------------------------------------------|
| Description: | Controls loopback tests, analog, digital, |
| | remote digital, and self tests. |
|--------------+---------------------------------------------|
| Bit | Value | Function |
|------+-------+---------------------------------------------|
| 0 | í 0 | Local analog loopback not in progress |
| | | |
| | 1 | Local analog loopback in progress |
|------+-------+---------------------------------------------|
| 1 | í 0 | Not used |
|------+-------+---------------------------------------------|
| 2 | í 0 | Local digital loopback not in progress |
| | | |
| | 1 | Local digital loopback in progress |
|------+-------+---------------------------------------------|
| 3 | í 0 | Modem not in remote digital loopback |
| | | |
| | 1 | Remote digital loopback in progress |
|------+-------+---------------------------------------------|
| 4 | í 0 | Remote digital loopback not requested |
| | | |
| | 1 | Remote digital loopback requested |
|------+-------+---------------------------------------------|
| 5 | í 0 | Remote digital loopback w/ self-test not in |
| | | progress |
| | 1 | |
| | | Remote digital loopback w/ self-test in |
| | | progress |
|------+-------+---------------------------------------------|
| 6 | í 0 | Local analog loopback w/ self-test not in |
| | | progress |
| | 1 | |
| | | Local analog loopback w/ self-test in |
| | | progress |
+------------------------------------------------------------+
+------------------------------------------------------------+
| XON/XOFF PASS-THROUGH |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Xn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects whether XON/XOFF signals are sent |
| | to remote modem |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| \X0 | XON/XOFF signals trapped by local modem |
|--------------+---------------------------------------------|
| \X1 | XON/XOFF passed through local modem |
+------------------------------------------------------------+