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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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RETRAIN MODE
Type: Register
Format: AT [cmds] S42=n [cmds]
Description: Selects whether the modem is allowed to perform retrains and fall-forward/fallback sequences.
Command Function
     S42=0 Retrain and fall-forward/fallback sequences disabled.
S42=1Retrain and fall-forward/fallback sequences enabled.

RESULT CODES
Type: Configuration
Format: AT [cmds] Xn [cmds]
Description: Enables selection of tone detection and associated result code format options.
Command Function
     X0 Busy and dial tone detection disabled; basic result codes only enabled.
     X1 Busy and dial tone detection disabled; extended result codes enabled.
     X2 Busy tone detection disabled, dial tone detection enabled; extended result codes enabled.
     X3 Busy tone detection enabled, dial tone detection disabled; extended result codes enabled.
X4Busy and dial tone detection enabled; extended result codes enabled.
     X5 Busy and dial tone detection enabled; extended result codes enabled.
     X6 Busy and dial tone detection enabled; extended result codes enabled.
     X7 Busy and dial tone detection enabled; basic result codes only enabled.

STANDBY TIMER
Type: Register
Format: AT [cmds] S89=n [cmds]
Default: 10
Range: 0, 5 - 255
Unit: 1 second
Description: Maximum duration of command mode inactivity allowed prior to the modem entering standby mode. A value of 0 disables this feature, and values of 1 through 4 set S89=5.

V.25 CALLING TONE
Type: Configuration
Format: AT [cmds] -Cn [cmds]
Description: Selects whether the modem will transmit a V.25 calling tone.
Command Function
-C0V.25 calling tone disabled.
     -C1 V.25 calling tone enabled.

V.25 CALLING TONE
Type: Register
Format: AT [cmds] S35=n [cmds]
Description: Selects whether the modem will transmit a V.25 calling tone.
Command Function
S35=0V.25 calling tone disabled.
     S35=1 V.25 calling tone enabled.

V.32bis TRAIN MODE
Type: Register
Format: AT [cmds] S43=n [cmds]
Description: Selects whether the modem will perform a rate training sequence after connecting to the remote modem in V.32bis mode.
Command Function
     S43=0 Rate training sequence enabled.
S43=1Rate training sequence disabled.

V.34 MODE
Type: Register
Format: AT [cmds] S28=n [cmds]
Description: Selects whether the modem will attempt to connect with the V.34 modulation.
Note: All values greater than 1 are equivalent to S28=1.
Command Function
     S28=0 V.34 modulation disabled.
S28=1V.34 modulation enabled.

VOICE LOOPBACK
Type: Immediate
Format: AT [cmds] &&S [cmds]
Description: Begins a loopback test for the microphone and speaker.

MT64DSU

Card Type CSU/DSU
Chip Set Unidentified
Maximum Data Rate 64Kbps
Data Bus External
Data Modulation Protocol B8RZ

CONNECTIONS
Function Label Function Label
DC power CN1 Line out CN4
RS-232/422 CN2 Power switch SW3
V.35 CN3    


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