User guide

Chapter 11: Command Line Interface
167
Configuring a Modem
The Modem menu offers commands used to configure modem access.
Callback (dialback) occurs when the originator of a call is immediately
called back in a second call as a response to the first dial-in. Both Dial-in
and Dialback must be enabled, and the dialback number for a user must
be configured in the authentication service used on the unit (local,
RADIUS, LDAP, or TACACS+).
Once you have configured the modem, the SX needs to be rebooted in
order for the changes to take effect (you will receive a message
prompting you to do this once you have made and applied your
changes).
The modem can be configured to allow a PPP connection, a direct
modem connection via Hyperterm, or both.
 All - Allows modem access to all modems. Looks for a PPP signal
and falls back to allow console access if the PPP signal is not
detected. In this mode, Modem Dial Back cannot be enabled.
 PPP Only - Allows only PPP connections. Allows GUI, SSH and
Telnet access (if enabled). Dialback is only allowed when utilizing a
PPP-Only configuration since allowing direct modem access would
circumvent this security protection.
 Console Only - Allows only console connections. Only CLI access is
allowed through a terminal emulation programs such as
Hypertreminal.
If All or PPP Only are used:
 The IP addresses of the Point-to-Point (PPP) server must be
entered. The default is 10.0.0.1
 The IP address of the PPP client must be entered. The default is
10.0.0.2.
If PPP Only is used:
 If you want to enable modem dialback, select the Enable Modem
Dial Back check box.
Command
Description
dialback
Enable/Disable the modem dial-back.
Modem must be enabled for this to work.
dialin
Enable/Disable Modem and PPP settings.
[enable <true|false>] [serverip ipaddress]
[clientip ipaddress]
accessmodes
[accessmodes <All|PPPOnly|ConsoleOnly]