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 [Image] 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 On Off w/HDLC framing Synchronous V.25 command set On On w/character 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 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 Use asynchronous V.25 command set. 10 Use synchronous V.25 command set with HDLC framing. 11 Use synchronous V.25 command set with character framing. 2 » 0 Addressed calling. 1 Direct access calling. 3 » 0 Use ASCII character set. 1 Use EBCDIC character set. RESTART REQUEST ACKNOWLEDGEMENT TIME Type: Register Format: AT [cmds] S81=n [cmds] Example: ATS81=15 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 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 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 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 Answer after two rings 1 Answer after number of rings set in S0. 1 » 0 Select 7 data bits, even parity, and one stop bit. 1 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 Description: Executes a cold reset and returns to AT command set.