Allen-Bradley MicroLogix 1100 Instruction Set Reference Manual page 567

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DISCONNECTING MODEM
1. 1. Ensure the DLG Utility has been shutdown.
2. 2.Start HyperTerminal (Do not re-connect)
3. 3.Open the previously configured "Datalog "
4. Type "+++" to place modem in command mode,
Do not press the ENTER KEY!
Your modem will respond: OK
5. Type "ATH "
6. Press Enter. This will send the disconnect command to modem.
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Publication 1763-RM001C-EN-P - October 2009
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