ISU AT Command Reference
ISU AT Command Reference
ISU AT Command Reference
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<strong>ISU</strong> <strong>AT</strong> <strong>Command</strong> <strong>Reference</strong>Phase I <strong>AT</strong> <strong>Command</strong>s5 Phase I <strong>AT</strong> <strong>Command</strong>s5.1 <strong>AT</strong> - <strong>AT</strong>tention CodeThis is the prefix for all commands except A/ and +++. When entered on its own, the <strong>ISU</strong> will respondOK.5.2 A/ - Repeat Last <strong>Command</strong>Repeat the last command issued to the <strong>ISU</strong> unless the power was interrupted or the unit is reset. A/ is notfollowed by .5.3 +++ - Escape SequenceThe escape sequence is used to transfer from in-call data mode to in-call command mode withoutdisconnecting from the remote modem. After a pause, the <strong>ISU</strong> will respond with OK. Register S2 can beused to alter the escape character from +, the factory default, to any hexadecimal value in the range 0 to255.5.4 A - Answer (Initial implementation; revised in Phase III)Answer immediately. This causes the <strong>ISU</strong> to answer the incoming data call.5.5 Bn - Communication StandardsSelect the communications standard to be used for data calls.No action, compatibility only.Any value for n accepted.5.6 Cn - Carrier ControlControl carrier detection.No action, compatibility only.Only n=1 accepted.Version 2.6March 30, 2006 15
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