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# HAYES MICROCOMPUTER PRODUCTS, INC.
ULTRA SMARTMODEM 14400
Modem Type Data (synchronous/asynchronous)
Maximum Data Rate 14.4Kbps
Data Bus External
Data Modulation Bell 103A/212A
Protocol
ITU-T V.21, V.22, V.22bis, V.23, V.32,
V.32bis
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-----------------+----------+--------------------+----------|
| Line in | CN1 | RS-232 | CN4 |
|-----------------+----------+--------------------+----------|
| Line out | CN2 | Power switch | SW2 |
|-----------------+----------+--------------------+----------|
| DC power | CN3 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COMMAND SETS |
|------------------------------------------------------------|
| Mode | SW1/1 |
|-------------------------------+----------------------------|
| » Enabled | On |
|-------------------------------+----------------------------|
| Disabled | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LEASED LINE CARRIER TRANSMIT LEVEL ADJUSTMENT |
|------------------------------------------------------------|
| Mode | SW1/2 |
|-------------------------------+----------------------------|
| » Disabled | On |
|-------------------------------+----------------------------|
| Enabled | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COMMAND MODE |
|------------------------------------------------------------|
| Mode | SW1/3 | SW1/4 |
|--------------------------------------------+-------+-------|
| AT command set | Off | Off |
|--------------------------------------------+-------+-------|
| Asynchronous V.25 command set | Off | On |
|--------------------------------------------+-------+-------|
| Synchronous V.25 command set w/HDLC | On | Off |
| framing | | |
|--------------------------------------------+-------+-------|
| Synchronous V.25 command set w/character | On | On |
| framing | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MI/MIC |
|------------------------------------------------------------|
| Mode | JP1 | JP2 |
|------------------+--------------------+--------------------|
| » Disabled | Pins 1 & 2 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| Enabled | Pins 2 & 3 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAGNOSTIC LED(S) |
|------------------------------------------------------------|
| LED | Color | Status | Condition |
|-----+-------+----------+-----------------------------------|
| HS | Red | On | Modem is operating at 4800bps or |
| | | | faster |
|-----+-------+----------+-----------------------------------|
| HS | Red | Off | Modem is operating at slower than |
| | | | 4800bps |
|-----+-------+----------+-----------------------------------|
| AA | Red | On | Auto-answer enabled |
|-----+-------+----------+-----------------------------------|
| AA | Red | Off | Auto-answer disabled |
|-----+-------+----------+-----------------------------------|
| AA | Red | Blinking | Line is ringing |
|-----+-------+----------+-----------------------------------|
| CD | Red | On | CD signal is high |
|-----+-------+----------+-----------------------------------|
| CD | Red | Off | CD signal is low |
|-----+-------+----------+-----------------------------------|
| OH | Red | On | Modem is off-hook |
|-----+-------+----------+-----------------------------------|
| OH | Red | Off | Modem is on-hook |
|-----+-------+----------+-----------------------------------|
| RD | Red | On | Modem is receiving data |
|-----+-------+----------+-----------------------------------|
| RD | Red | Off | Modem is not receiving data |
|-----+-------+----------+-----------------------------------|
| SD | Red | On | Modem is transmitting data |
|-----+-------+----------+-----------------------------------|
| SD | 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 |
+------------------------------------------------------------+
Proprietary AT Command Set
+------------------------------------------------------------+
| COMMAND MODE OPTIONS |
|------------------------------------------------------------|
| Format | AT [cmds] S94=n [cmds] |
|-----------------+------------------------------------------|
| Example: | ATS94=40<CR> |
|-----------------+------------------------------------------|
| Default: | 0 |
|-----------------+------------------------------------------|
| Range: | 0 - 15 |
|-----------------+------------------------------------------|
| Unit: | Bit-mapped |
|-----------------+------------------------------------------|
| Description: | Sets various options for command set |
| | modes. |
|------------------------------------------------------------|
| Bit | Value | Function |
|-----------+-------+----------------------------------------|
| 1, 0 | » 00 | Use AT command set. |
| | 01 10 | |
| | 11 | Use asynchronous V.25 command set. |
| | | |
| | | Use synchronous V.25 command set with |
| | | HDLC framing. |
| | | |
| | | Use synchronous V.25 command set with |
| | | character framing. |
|-----------+-------+----------------------------------------|
| 2 | » 0 1 | Addressed calling. |
| | | |
| | | Direct access calling. |
|-----------+-------+----------------------------------------|
| 3 | » 0 1 | Use ASCII character set. |
| | | |
| | | Use EBCDIC character set. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| RESTART REQUEST ACKNOWLEDGEMENT TIME |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S81=n [cmds] |
|--------------+---------------------------------------------|
| Example: | ATS81=15<CR> |
|--------------+---------------------------------------------|
| Default: | 18 |
|--------------+---------------------------------------------|
| Range: | 0-255 |
|--------------+---------------------------------------------|
| Unit: | 10 seconds |
|--------------+---------------------------------------------|
| Description: | Sets the time the transmitting modem will |
| | wait for acknowledgement of its restart |
| | request before it initiates a recovery. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| RESTART REQUEST MAXIMUM |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S80=n [cmds] |
|--------------+---------------------------------------------|
| Example: | ATS80=8<CR> |
|--------------+---------------------------------------------|
| Default: | 1 |
|--------------+---------------------------------------------|
| Range: | 0-255 |
|--------------+---------------------------------------------|
| Unit: | N/A |
|--------------+---------------------------------------------|
| Description: | Sets the number of times a restart request |
| | can be retransmitted. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V.22 PROBE REJECT TIME |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S97=n [cmds] |
|--------------+---------------------------------------------|
| Example: | ATS97=15<CR> |
|--------------+---------------------------------------------|
| Default: | 30 |
|--------------+---------------------------------------------|
| Range: | 15-70 |
|--------------+---------------------------------------------|
| Unit: | .1 second |
|--------------+---------------------------------------------|
| Description: | Sets the time for which the modem will |
| | reject the V.22/V.22bis probe signal when |
| | in V.32 mode. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V.25 OPTIONS |
|------------------------------------------------------------|
| Format | AT [cmds] S115=n [cmds] |
|---------------+--------------------------------------------|
| Example: | ATS115=40<CR> |
|---------------+--------------------------------------------|
| Default: | 0 |
|---------------+--------------------------------------------|
| Range: | 0 - 3 |
|---------------+--------------------------------------------|
| Unit: | Bit-mapped |
|---------------+--------------------------------------------|
| Description: | Sets V.25 data mode and V.25 auto-answer |
| | mode. |
|------------------------------------------------------------|
| Bit | Value | Function |
|---------+--------+-----------------------------------------|
| 0 | » 0 1 | Answer after two rings |
| | | |
| | | Answer after number of rings set in S0. |
|---------+--------+-----------------------------------------|
| 1 | » 0 1 | Select 7 data bits, even parity, and |
| | | one stop bit. |
| | | |
| | | Select 8 data bits, no parity, and one |
| | | stop bit. |
+------------------------------------------------------------+
Proprietary V.25bis Command Set
+------------------------------------------------------------+
| RESET TO AT COMMAND SET |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | RST |
|--------------+---------------------------------------------|
| Example: | RST<CR> |
|--------------+---------------------------------------------|
| Description: | Executes a cold reset and returns to AT |
| | command set. |
+------------------------------------------------------------+