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# MICROCOM, INC.
DESKPORTE 28.8P
Card Type Modem (synchronous/asynchronous)
Processor Z80182
Processor Speed 18.4MHz
Chipset Microcom
Maximum Onboard Memory 32KB SRAM/128KB Flash ROM
Maximum Data Rate 28.8Kbps
Maximum Fax Rate 14.4Kbps
Data Bus Serial, parallel
Fax Class Class I & II
Data Modulation Bell 103A/212A
ITU-T V.21, V.22, V.22bis, V.23, V.32,
V.32bis, V.34
Rockwell V.FC
Fax Modulation Unidentified
Error MNP5, MNP10, V.42, V.42bis
Correction/Compression
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|------------------------------------------------------------|
| Line out | CN1 | RS-232/422 port | CN4 |
|-------------------------+---------+-----------------+------|
| Line in | CN2 | DC power | CN5 |
|-------------------------+---------+-----------------+------|
| Parallel port | CN3 | Power switch | SW1 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAGNOSTIC LED(S) (POWER-UP) |
|------------------------------------------------------------|
| AA | TM | HS | Condition |
|----------+----------+----------+---------------------------|
| Off | On | Off | RAM test failed |
|----------+----------+----------+---------------------------|
| Off | On | Off | Modem failed |
|----------+----------+----------+---------------------------|
| On | On | On | CPU test failed |
|----------+----------+----------+---------------------------|
| Off | Off | Off | All tests passed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAGNOSTIC LED(S) (NORMAL OPERATION) |
|------------------------------------------------------------|
| LED | Color | Status | Condition |
|-----+--------------+----------+----------------------------|
| AA | Unidentified | On | Auto-answer enabled |
|-----+--------------+----------+----------------------------|
| AA | Unidentified | Off | Auto-answer disabled |
|-----+--------------+----------+----------------------------|
| AA | Unidentified | Blinking | Phone is ringing |
|-----+--------------+----------+----------------------------|
| RD | Unidentified | Blinking | Modem is receiving data |
|-----+--------------+----------+----------------------------|
| RD | Unidentified | Off | Modem is not receiving |
| | | | data |
|-----+--------------+----------+----------------------------|
| SD | Unidentified | Blinking | Modem is transmitting data |
|-----+--------------+----------+----------------------------|
| SD | Unidentified | Off | Modem is not transmitting |
| | | | data |
|-----+--------------+----------+----------------------------|
| CD | Unidentified | On | Carrier signal detected |
|-----+--------------+----------+----------------------------|
| CD | Unidentified | Off | Carrier signal not |
| | | | detected |
|-----+--------------+----------+----------------------------|
| OH | Unidentified | On | Modem is off-hook |
|-----+--------------+----------+----------------------------|
| OH | Unidentified | Off | Modem is on-hook |
|-----+--------------+----------+----------------------------|
| TR | Unidentified | On | DTR signal is high |
|-----+--------------+----------+----------------------------|
| TR | Unidentified | Off | DTR signal is low |
|-----+--------------+----------+----------------------------|
| TM | Unidentified | On | Modem is performing |
| | | | self-test |
|-----+--------------+----------+----------------------------|
| TM | Unidentified | 2s blink | RAM test failed |
|-----+--------------+----------+----------------------------|
| TM | Unidentified | 1s blink | ROM test failed |
|-----+--------------+----------+----------------------------|
| TM | Unidentified | 2/3s | Data pump test failed |
| | | blink | |
|-----+--------------+----------+----------------------------|
| TM | Unidentified | Off | Self-tests passed |
|-----+--------------+----------+----------------------------|
| HS | Unidentified | On | Modem is not connected or |
| | | | is connected at between |
| | | | 4800bps and 12Kbps |
|-----+--------------+----------+----------------------------|
| HS | Unidentified | Blinking | Modem is connected at |
| | | | 14.4Kbps or faster |
|-----+--------------+----------+----------------------------|
| HS | Unidentified | Off | Modem is connected at less |
| | | | than 4800bps |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SUPPORTED STANDARD COMMANDS |
|------------------------------------------------------------|
| Basic AT Commands |
|------------------------------------------------------------|
| +++, ‘comma’, A/ |
|------------------------------------------------------------|
| A, B, E, H, I, L, M, O, P, Q, T, V, W, X, Y, Z |
|------------------------------------------------------------|
| &D, &F, &G, &M, &P, &T, &W, &X, &Y, &Z |
|------------------------------------------------------------|
| Extended AT Commands |
|------------------------------------------------------------|
| \A, \B, \C, \E, \J, \N, \Q, \T |
|------------------------------------------------------------|
| %A, %C, %E, %F, %G |
|------------------------------------------------------------|
| Special AT Commands |
|------------------------------------------------------------|
| -J, *H, )M, @M, :E |
|------------------------------------------------------------|
| S-Registers |
|------------------------------------------------------------|
| S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S12, S14, |
| S16, S18, S22, S23, S25, S26, S27 |
|------------------------------------------------------------|
| Note: See MHI documentation for complete information. |
+------------------------------------------------------------+
Proprietary AT Command Set
+------------------------------------------------------------+
| DISPLAY BLACKLIST NUMBERS |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] *N [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays the list of all the numbers on the |
| | blacklist (whether they are |
| | delayed/forbidden or not), and their |
| | statuses. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DISPLAY DELAYED NUMBERS |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] *D [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays the list of all delayed numbers |
| | and their statuses. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DISPLAY FORBIDDEN NUMBERS |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] *F [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays the list of all forbidden numbers |
| | and their statuses. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CONNECT SPEED MATCHING |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %Ln [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects whether the modem will attempt to |
| | match the connect speed of the remote |
| | modem. |
|------------------------------------------------------------|
| Command | Function |
|---------------+--------------------------------------------|
| %L0 | Modem will connect at speeds supported by |
| | the protocol selected only. |
|---------------+--------------------------------------------|
| í %L1 | Modem will match connect speeds. |
|---------------+--------------------------------------------|
| %L2 | Modem will connect only at current speed. |
|---------------+--------------------------------------------|
| %L3 | Modem will use V.8 automode with fallback |
| | to ITU-T automode to match speeds. |
|---------------+--------------------------------------------|
| %L4 | Modem will use V.8 automode to match |
| | speeds. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V.34 TRAINING RESPONSE |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] :T42=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets what speed the modem will choose after |
| | a V.34 train. |
|------------------------------------------------------------|
| Command | Function |
|---------------+--------------------------------------------|
| í :T42=0 | Standard speed selection. |
|---------------+--------------------------------------------|
| :T42=1 | Choose speed approximately 2 speeds faster |
| | than standard. |
|---------------+--------------------------------------------|
| :T42=2 | Choose speed approximately 1 speed faster |
| | than standard. |
|---------------+--------------------------------------------|
| :T42=3 | Standard speed selection. |
|---------------+--------------------------------------------|
| :T42=4 | Choose speed approximately 1 speed slower |
| | than standard. |
|---------------+--------------------------------------------|
| :T42=5 | Choose speed approximately 2 speeds slower |
| | than standard. |
+------------------------------------------------------------+
See MICROCOM, INC. DESKPORTE FAST for a full command summary.