ULTRA SMARTMODEM 14400 modem/telephone/ISDN Settings and Configuration
HAYES MICROCOMPUTER PRODUCTS, INC.
ULTRA SMARTMODEM 14400
Modem Type | Data (synchronous/asynchronous) |
Maximum Data Rate | 14.4Kbps |
Data Bus | External |
Data Modulation Protocol | Bell 103A/212A ITU-T V.21, V.22, V.22bis, V.23, V.32, V.32bis |
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 framing | On | Off |
Synchronous V.25 command set w/character framing | On | On |
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 01 10 11 | Use AT command set. 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. |
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