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# RACAL-DATACOM
RMD 3222
Card Type Modem (synchronous/asynchronous)
Chipset Unidentified
Maximum Data Rate 14.4Kbps
Data Modulation Bell 103A, 208, 212A
ITU-T V.21, V.22, V.22bis, V.23, V.32,
V.32bis, V.33
Error MNP5, V.42, V.42bis
Correction/Compression
Data Bus Serial
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|-------------------+-------+------------------------+-------|
| PREVIOUS button | BT1 | Leased telephone line | CN2 |
| | | out | |
|-------------------+-------+------------------------+-------|
| 1 button | BT2 | Switched telephone | CN3 |
| | | line out | |
|-------------------+-------+------------------------+-------|
| 2 button | BT3 | AC power in | CN4 |
|-------------------+-------+------------------------+-------|
| 3 button | BT4 | Diagnostic connector | CN5 |
|-------------------+-------+------------------------+-------|
| NEXT button | BT5 | Serial port | CN6 |
|-------------------+-------+------------------------+-------|
| ENTER button | BT6 | LCD display | LCD |
|-------------------+-------+------------------------+-------|
| Telephone line in | CN1 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MISCELLANEOUS TECHNICAL NOTES |
|------------------------------------------------------------|
| There are several jumpers on this board. Their exact |
| locations and functions are unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SUPPORTED STANDARD COMMANDS |
|------------------------------------------------------------|
| Basic AT Commands |
|------------------------------------------------------------|
| +++, ‘comma’, A/ |
|------------------------------------------------------------|
| A, B, E, H, L, M, N, O, P, T, V, X, Y, Z |
|------------------------------------------------------------|
| &C, &D, &F, &G, &K, &M, &Q, &S, &T, &W, &Y, &Z |
|------------------------------------------------------------|
| Extended AT Commands |
|------------------------------------------------------------|
| \T, \V, \X |
|------------------------------------------------------------|
| S-Registers |
|------------------------------------------------------------|
| S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, |
| S18, S25, S26 |
|------------------------------------------------------------|
| V.25bis Commands |
|------------------------------------------------------------|
| CIC, CRN, CRS, DIC, PRN |
|------------------------------------------------------------|
| Note: See MHI help file for complete information. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| UNIDENTIFIED COMMANDS |
|------------------------------------------------------------|
| Command | Default |
|------------------------------+-----------------------------|
| | |
+------------------------------------------------------------+
Proprietary AT Command Set
+------------------------------------------------------------+
| BREAK TYPE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Kn [cmds] |
|--------------+---------------------------------------------|
| Description: | Configures the modem's reaction to |
| | receiving a break signal. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| \K0 | Modem ignores received break signal. |
|--------------+---------------------------------------------|
| \K1 | Buffers are cleared, break is transmitted |
| | immediately. |
|--------------+---------------------------------------------|
| \K2 | Buffers are not cleared, break is |
| | transmitted immediately. |
|--------------+---------------------------------------------|
| í \K3 | Buffers are not cleared, break is |
| | transmitted in sequence with data. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CARRIAGE RETURN DELAY |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Fn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects whether the modem will insert a |
| | delay the length of five characters after |
| | sending any character that would cause a |
| | printer or teletype's carriage to return. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| \F0 | Carriage return delay enabled. |
|--------------+---------------------------------------------|
| í \F1 | Carriage return delay disabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CONNECT MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Nn [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls the type of connection the modem |
| | will make. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| \N0 | Normal mode enabled. |
|--------------+---------------------------------------------|
| \N1 | Reliable mode enabled. |
|--------------+---------------------------------------------|
| \N2 | Normal mode enabled. |
|--------------+---------------------------------------------|
| í \N3 | Auto-reliable mode enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CTS AND RTS SIGNALS |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Rn [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls the behaviour of the CTS and RTS |
| | signals. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í &R0 | CTS follows RTS. |
|--------------+---------------------------------------------|
| &R1 | CTS follows DTR. |
|--------------+---------------------------------------------|
| &R2 | CTS normal. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAL |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] D<#>;[cmds] |
|--------------+---------------------------------------------|
| Description: | Dials the telephone number indicated |
| | according to any modifiers included in the |
| | string. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| DLn | If connection is not successful, modem will |
| | dial the number stored in memory location |
| | n. |
|--------------+---------------------------------------------|
| DP | Pulse dialing enabled. |
|--------------+---------------------------------------------|
| DR | Answer mode enabled; originate mode |
| | disabled following handshake initiation. |
| | This must be the last modifier except for a |
| | semicolon. |
|--------------+---------------------------------------------|
| DS=n | Dial stored telephone number n. |
|--------------+---------------------------------------------|
| 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; | Modem returned to idle state after dialing. |
| | The semicolon can only be placed at the end |
| | of the dial command. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DISPLAY CONFIGURATION |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Vn [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays the indicated part of the modem's |
| | configuration. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &V0 | Displays the command settings, stored |
| | profiles, and stored telephone numbers 0 |
| | through 5. |
|--------------+---------------------------------------------|
| &V1 | Displays all stored telephone numbers. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DISPLAY CONFIGURATION - MNP |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \S [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays the settings of the modem's |
| | MNP-related commands. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 | Tests and displays ROM checksum result. |
|--------------+---------------------------------------------|
| I3 | Displays firmware revision. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ERROR CORRECTION TYPE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Pn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects which types of error correction the |
| | modem will attempt to use. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| \P0 | Modem will use V.42 error correction only. |
|--------------+---------------------------------------------|
| \P1 | Modem will use MNP error correction only. |
|--------------+---------------------------------------------|
| í \P2 | Modem will use V.42 or MNP error |
| | correction. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOW CONTROL |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Qm,n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects the type or types of flow control |
| | the modem will use. |
|--------------+---------------------------------------------|
| Note: | Two types of flow control may be active at |
| | any time. There is no difference between |
| | the values of m and n. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| \Q0 | Flow control disabled. |
|--------------+---------------------------------------------|
| \Q1 | CTS/RTS flow control enabled. |
|--------------+---------------------------------------------|
| \Q2 | DC1/DC2 flow control enabled. |
|--------------+---------------------------------------------|
| í \Q3 | DC1/DC3 flow control enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LOCK SERIAL PORT |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Bn [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets operation of serial port speed. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| \B0 | Serial port speed follows connect speed. |
|--------------+---------------------------------------------|
| í \B1 | Serial port speed locked. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MNP MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Cn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects which classes of MNP the modem will |
| | attempt to use. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| \C1 | Modem may use MNP class 1 only. |
|--------------+---------------------------------------------|
| \C2 | Modem may use MNP class 2 or 1. |
|--------------+---------------------------------------------|
| \C3 | Modem may use MNP class 3 and below. |
|--------------+---------------------------------------------|
| \C4 | Modem may use MNP class 4 and below. |
|--------------+---------------------------------------------|
| í \C5 | Modem may use all MNP classes (5 and |
| | below). |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PROTOCOL/SPEED |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Fn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects the modulation protocol and line |
| | speed the modem will attempt to connect |
| | with. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í F0 | Auto-detect fastest common protocol. |
|--------------+---------------------------------------------|
| F1 | Attempt to connect with V.21 at 300bps. |
|--------------+---------------------------------------------|
| F2 | Attempt to connect with V.22 at 600bps. |
|--------------+---------------------------------------------|
| F3 | Attempt to connect with V.23 at 1200/75bps. |
|--------------+---------------------------------------------|
| F4 | Attempt to connect with V.22 at 1200bps. |
|--------------+---------------------------------------------|
| F5 | Attempt to connect with V.22bis at 2400bps. |
|--------------+---------------------------------------------|
| F6 | Attempt to connect with V.32 at 9600bps. |
|--------------+---------------------------------------------|
| F7 | Attempt to connect with V.32 at 14.4Kbps. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| RESULT CODE - DIALING |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Dn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects whether the modem will display |
| | DIALING when it goes off hook to dial a |
| | telephone number. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í \D0 | DIALING result code disabled. |
|--------------+---------------------------------------------|
| \D1 | DIALING result code enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| RESULT CODES |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Qn [cmds] |
|--------------+---------------------------------------------|
| Description: | Enables modem to send result codes to the |
| | DTE. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í Q0 | Result codes enabled. |
|--------------+---------------------------------------------|
| Q1 | Result codes disabled. |
|--------------+---------------------------------------------|
| Q2 | Result codes enabled in originate mode |
| | only. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V.42bis MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Mn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects whether the modem will attempt to |
| | connect with V.42bis data compression. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í \M0 | V.42bis data compression enabled. |
|--------------+---------------------------------------------|
| \M1 | V.42bis data compression disabled. |
+------------------------------------------------------------+
Proprietary V.25bis Command Set
+------------------------------------------------------------+
| COMMAND SET - AT |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | RHA |
|--------------+---------------------------------------------|
| Description: | Resets the modem to AT command mode. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| REQUEST LISTED NUMBERS |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | RLN |
|--------------+---------------------------------------------|
| Description: | Requests the modem to return the list of |
| | stored numbers. |
+------------------------------------------------------------+