ISU AT Command Reference

ISU AT Command ReferenceTable of ContentsTable of Contents1 Introduction....................................................................................................................11.1 Scope.................................................................................................................................................................. 11.2 Reference............................................................................................................................................................ 11.3 Terms /and Abbreviations .................................................................................................................................. 12 Modem Overview ...........................................................................................................42.1 DTE-ISU Interchange Circuits........................................................................................................................... 42.2 9-Wire and 3-Wire Operation............................................................................................................................. 42.3 Configuration Settings........................................................................................................................................ 42.4 Mode of Operation ............................................................................................................................................. 42.5 Hardware Failure Reporting............................................................................................................................... 52.6 Ring Indicate Signal........................................................................................................................................... 53 Command Overview ......................................................................................................63.1 Command Types ................................................................................................................................................ 63.2 Basic Commands................................................................................................................................................ 63.3 Extended Commands.......................................................................................................................................... 63.4 Command and Response Characters .................................................................................................................. 73.5 Command Entry ................................................................................................................................................. 83.6 Command Responses ......................................................................................................................................... 94 Phased Implementation by Software Release...........................................................105 Phase I AT Commands................................................................................................155.1 AT - ATtention Code ....................................................................................................................................... 155.2 A/ - Repeat Last Command.............................................................................................................................. 155.3 +++ - Escape Sequence .................................................................................................................................... 155.4 A - Answer (Initial implementation; revised in Phase III) ............................................................................... 155.5 Bn - Communication Standards........................................................................................................................ 155.6 Cn - Carrier Control ......................................................................................................................................... 155.7 D - Dial (Initial implementation; revised in Phase III)..................................................................................... 165.7.1 Direct Dial From Phonebook (Initial implementation; revised in Phase III) ..................................... 165.8 En - Echo.......................................................................................................................................................... 175.9 Fn - Line Modulation ....................................................................................................................................... 175.10 Hn - Hangup (Initial implementation; revised in Phase III) ............................................................................. 175.11 In – Identification (Initial implemenation; revised in Phase VI) ...................................................................... 175.12 Ln - Loudspeaker Volume................................................................................................................................ 175.13 Mn - Speaker Control....................................................................................................................................... 175.14 Nn - Automode Enable..................................................................................................................................... 185.15 On - Online....................................................................................................................................................... 185.16 P - Pulse Dial.................................................................................................................................................... 185.17 Qn - Quiet Mode .............................................................................................................................................. 185.18 S0=n - Auto-Answer (Initial implementation; revised in Phase III)................................................................. 18March 30, 2006Version 2.6iv