ISU AT Command Reference

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ISU AT Command ReferenceS-Register Definitions11 S-Register DefinitionsS-registers allow control over specific ISU modem operations. Some S-registers contain a single numericvalue. Other S-registers are bit mapped where individual bits, or sets of bits, control specific functions.11.1 S-Register CommandsCommands allow S-registers to be read, written,, or simply referenced (i.e. set a pointer to designate thecurrent, referenced S-register). S-register commands are described in the following subsections.11.1.1 Sr - Direct S-Register ReferenceSet a pointer to reference S-register r.11.1.2 Sr? - Direct S-Register ReadRead the value of S-register r.11.1.3 Sr=n - Direct S-Register WriteSet the value of S-register r to n, where n is a decimal value in the range 0 to 255.11.1.4 ? - Referenced S-Register ReadRead the value of the current referenced S-register. The current referenced S-register is that which was lastacted upon by a direct reference (ATSr), read (ATSr?), or write (ATSr=n) command.11.1.5 =n - Referenced S-Register WriteSet the value of the current referenced S-register to n. The current referenced S-register is that which waslast acted upon by a direct reference (ATSr), read (ATSr?), or write (ATSr=n) command.Version 2.6March 30, 2006 82
ISU AT Command ReferenceS-Register Definitions11.2 Standard S-RegistersRegisterNumberTable 10-1: Standard S-RegistersRange Default DescriptionS0 0-255 0 Autoanswer. Assigning a value from 1 to 255 in register S0tells the ISU to automatically answer incoming calls. Thefactory setting of 0 turns off the automatic answer feature.Register S15 controls the type of call to be automaticallyanswered.Sr=n CommandWrite Protectedin SAC0201S1 0-255 0 Ring count YesS2 0-255 43 Escape code characterS3 0-127 13 Carriage return characterS4 0-127 10 Line feed characterS5 0-32 8 Backspace characterS6 0-255 4 Wait for dial-tone.No action, compatibility onlyS7 0-255 50 Communication standard used by ISUNo action, compatibility onlyS8 0-255 4 Pause time for comma.No action, compatibility onlyS9 0-255 6 Carrier detect response time.No action, compatibility onlyS10 0-255 14 Carrier loss time.No action, compatibility onlyS11 0-255 0 DTMF tone duration.No action, compatibility onlyS12 0-255 40 Escape guard time. Time, in 50ths of a second, until OKdisplayed after entering command mode by escape sequence.S14 0-255 170 Bitmap register where bit 1 reflects the En setting, bit 2 turnsoff command responses, bit 3 reflects the Vn setting, bit 5reflects pulse/tone dial modeS21 0-255 48 Bitmap register where bit 0 reflects telephone jack control,bit 2 reflects RTS/CTS on/off, bits 3 and 4 reflect the &Dnsetting,bit 5 reflects the &Cn setting, bit 6 reflects DSRon/off, and bit 7 reflects disconnecting long space.S22 0-255 246 Bitmap register where bits 0 and 1 reflect the speakervolume setting, bits 2 and 3 reflect the speaker on/offsetting, and bits 4, 5 and 6 reflect the Xn setting.YesYesYesVersion 2.6March 30, 2006 83
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ISU AT Command ReferenceTable of Co
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ISU AT Command ReferenceIntroductio
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ISU AT Command ReferenceIntroductio
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ISU AT Command ReferenceModem Overv
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ISU AT Command ReferenceCommand Ove
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ISU AT Command ReferenceCommand Ove
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ISU AT Command ReferencePhased Impl
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ISU AT Command ReferencePhased Impl
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ISU AT Command ReferencePhase I AT
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