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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
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Type:
| Register
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Format:
| AT [cmds] S42=n [cmds]
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Description:
| Selects whether the modem is allowed to perform retrains and fall-forward/fallback sequences.
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Command
| Function
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S42=0
| Retrain and fall-forward/fallback sequences disabled.
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S42=1 | Retrain and fall-forward/fallback sequences enabled.
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RESULT CODES
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Type:
| Configuration
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Format:
| AT [cmds] Xn [cmds]
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Description:
| Enables selection of tone detection and associated result code format options.
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Command
| Function
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X0
| Busy and dial tone detection disabled; basic result codes only enabled.
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X1
| Busy and dial tone detection disabled; extended result codes enabled.
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X2
| Busy tone detection disabled, dial tone detection enabled; extended result codes enabled.
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X3
| Busy tone detection enabled, dial tone detection disabled; extended result codes enabled.
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X4 | Busy and dial tone detection enabled; extended result codes enabled.
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X5
| Busy and dial tone detection enabled; extended result codes enabled.
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X6
| Busy and dial tone detection enabled; extended result codes enabled.
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X7
| Busy and dial tone detection enabled; basic result codes only enabled.
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STANDBY TIMER
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Type:
| Register
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Format:
| AT [cmds] S89=n [cmds]
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Default:
| 10
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Range:
| 0, 5 - 255
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Unit:
| 1 second
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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.
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V.25 CALLING TONE
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Type:
| Configuration
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Format:
| AT [cmds] -Cn [cmds]
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Description:
| Selects whether the modem will transmit a V.25 calling tone.
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Command
| Function
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-C0 | V.25 calling tone disabled.
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-C1
| V.25 calling tone enabled.
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V.25 CALLING TONE
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Type:
| Register
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Format:
| AT [cmds] S35=n [cmds]
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Description:
| Selects whether the modem will transmit a V.25 calling tone.
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Command
| Function
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S35=0 | V.25 calling tone disabled.
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S35=1
| V.25 calling tone enabled.
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V.32bis TRAIN MODE
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Type:
| Register
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Format:
| AT [cmds] S43=n [cmds]
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Description:
| Selects whether the modem will perform a rate training sequence after connecting to the remote modem in V.32bis mode.
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Command
| Function
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S43=0
| Rate training sequence enabled.
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S43=1 | Rate training sequence disabled.
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V.34 MODE
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Type:
| Register
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Format:
| AT [cmds] S28=n [cmds]
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Description:
| Selects whether the modem will attempt to connect with the V.34 modulation.
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Note:
| All values greater than 1 are equivalent to S28=1.
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Command
| Function
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S28=0
| V.34 modulation disabled.
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S28=1 | V.34 modulation enabled.
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VOICE LOOPBACK
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Type:
| Immediate
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Format:
| AT [cmds] &&S [cmds]
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Description:
| Begins a loopback test for the microphone and speaker.
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MT64DSU
Card Type
| CSU/DSU
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Chip Set
| Unidentified
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Maximum Data Rate
| 64Kbps
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Data Bus
| External
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Data Modulation Protocol
| B8RZ
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CONNECTIONS
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Function
| Label
| Function
| Label
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DC power
| CN1
| Line out
| CN4
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RS-232/422
| CN2
| Power switch
| SW3
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V.35
| CN3
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