Chapter 3. Installing an Analog Modem

Express Configuration Wizard Modem Disable

Use the Express Configuration Wizard to disable the external an- alog modem by deselecting the Connect External Modem option. Figure 3-2 on page 32 illustrates the Connect External Modem op- tion.

See the section Express Configuration Tray Tool Menu on page 22 for more information on disabling a modem.

Terminal Emulation Modem Enable

An alternative method of enabling/disabling an external analog modem is to use a terminal emulation package such as HyperAC- CESS. In order to determine if an external analog modem is prop- erly connected to the Express XRT, issue the AT command AT!Z (followed by Enter). If an external analog modem is properly con- nected to the Express XRT, the Express XRT responds with the message MODEM FOUND (shown in Figure 3-4 on page 34).

The AT!Z command is directed to the Express XRT, not the analog modem itself. An ERROR occurs if the command is sent while the external analog modem is enabled.

If the external analog modem is not properly connected to the Ex- press XRT, the Express XRT responds with the message NO MO-

DEM FOUND.

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ADTRAN Express XRT manual Express Configuration Wizard Modem Disable, Terminal Emulation Modem Enable, DEM Found