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Appendix C
AT Commands
The AT commands (shown in Table
Commands should be entered without the AT prefix.
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| Table |
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| AT Commands |
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Command | Definition | Function |
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A | Answer | Places the ISU 512 into answer mode |
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D | Dial | Precedes the telephone access number [ATD551212] |
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H | Hangup | Disconnects the current call |
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l0 | Identify unit | Displays model number |
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l1 | - | Displays software version |
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S | - | |
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SS | S String register | - |
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&W | - | Saves current configuration to EEPROM |
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| Carrier Detect (CD) Control Line options | |
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&C0 | - | CD forced |
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&C1 | - | CD normal |
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&C2 | - | CD with local disconnect |
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&C3 | - | CD off link down |
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ISU 512 User Manual | 85 |