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Micro House PC Hardware Library Volume II: Network Interface Cards And Modems Micro House PC Hardware Library Volume II: Network Interface Cards And Modems
by Micro House International, Inc. and Scott Mueller
Que, Macmillan Computer Publishing
ISBN: 078971664x   Pub Date: 06/17/98
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EXTENDED RESULT CODES
Type: Configuration
Format: AT [cmds] &An [cmds]
Description: Selects extended result codes.
Command Function
     &A0 Extended result codes disabled.
     &A1 Error correction result codes enabled.
     &A2 V.32 result code enabled.
&A3Error correction and compression result codes enabled.

FLOW CONTROL CHARACTER - XOFF
Type: Register
Format: AT [cmds] S23=n [cmds]
Default: 19
Range: 0 - 127
Unit: 1 ASCII character
Description: Sets the character used to represent XOFF.

FLOW CONTROL CHARACTER - XON
Type: Register
Format: AT [cmds] S22=n [cmds]
Default: 17
Range: 0 - 127
Unit: 1 ASCII character
Description: Sets the character used to represent XON.

FLOW CONTROL - MODEM-TO-MODEM
Type: Configuration
Format: AT [cmds] &In [cmds]
Description: Selects the type of modem-to-modem flow control used.
Command Function
&I0 Software flow control disabled.
&I1 XON/XOFF pass-through enabled.
&I2 XON/XOFF pass-through disabled.
&I3 Hewlett-Packard ENQ/ACK host mode enabled.
&I4 Hewlett-Packard ENQ/ACK terminal mode enabled.
&I5 XON/XOFF pass-through enabled in normal mode and disabled in error-correcting mode.

LOCK SERIAL PORT
Type: Configuration
Format: AT [cmds] &Bn [cmds]
Description: Sets operation of serial port speed.
Command Function
     &B0 Serial speed follows connect speed.
     &B1 Serial speed locked.
&B2Serial speed locked in error correction mode only.

RESULT CODES
Type: Configuration
Format: AT [cmds] Qn [cmds]
Description: Enables modem to send result codes to the DTE.
Command Function
Q0Result codes enabled.
     Q1 Result codes disabled.
     Q2 Result codes enabled in originate mode only.

V.21 ANSWER MODE FALLBACK TIMER
Type: Register
Format: AT [cmds] S29=n [cmds]
Default: 20
Range: Unidentified
Unit: .1 second
Description: The function of this register is unidentified.

V.32 HANDSHAKE TIME
Type: Register
Format: AT [cmds] S28=n [cmds]
Default: 8
Range: 0 – 255
Unit: .1 second
Description: Sets length of V.32 handshaking phase.

MOTOROLA, INC.

MODEMSURFR 56K (EXTERNAL)

Card Type Modem (asynchronous)
Chip Set Rockwell
Maximum Modem Rate 56Kbps
Maximum Fax Rate 14.4Kbps
Data Modulation Protocol Bell 103A/212A
ITU-T V.21, V.22, V.22bis, V.23, V.32, V.32bis, V.34
Rockwell V.FC, K56+
Fax Modulation Protocol ITU-T V.17, V.21CH2, V.27ter, V.29
Error Correction/Compression MNP5, V.42, V.42bis
Fax Class Class I
Data Bus Serial

CONNECTIONS
Function Label Function Label
DC power in CN1 Telephone line in CN3
Serial port CN2 Telephone line out CN4

DIAGNOSTIC LED(S)
LED Color Status Condition
TR Red On DTR signal is high
TR Red Off DTR signal is low
CD Red On Carrier signal detected
CD Red Off Carrier signal not detected
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
OH Red On Modem is off-hook
OH Red Off Modem is on-hook
RI Red On Power is on
RI Red Blinking Phone is ringing
RI Red Off Power is off


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