Web Manager for Administrators > Configuration>Serial/AUX>Aux/Modem Port

Configuration>Serial/AUX>Aux/Modem Port
Selecting Configuration>Serial/AUX>Aux/Modem Port in Expert mode brings up three tabs, as shown in the following figure.
Web Manager Configuration>Serial/AUX>Aux/Modem Port Screen
An administrative user can use either the AuxPort1 and AuxPort2 screens to enable and to configure an auxiliary port if one of the following is connected to an AUX port:

Web Manager for Administrators > Configuration>Serial/AUX>Aux/Modem Port