I-Tech Company CMS 6R4 Series - Manual (Page 79)

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Operation
6.3.4. Modem Mode
The Modem Mode provides features specifically related to modem
communication. A Modem Mode Port can perform all functions normally
available in Any-to-Any Mode. The Modem Mode is available to all Serial
RS232 Ports, and is the default port mode at the Internal Modem Port (Port 7.)
When the Modem Mode is selected, the Port Configuration menu will display
three additional prompts, which allow you to re-define the modem reset string,
initialization string, and hang-up string.
When a call is received at a Modem Mode port, the unit will prompt the caller
to enter a password. The CMS-6R4 allows three attempts to enter a valid
password. If a valid password is not entered within three attempts, or if the
user does not respond to the login prompt within 30 seconds, the modem will
disconnect.
Notes:
• When a Modem Mode port exits command mode, or the DCD
line is lost while command mode is active, the CMS-6R4 will
pulse DTR to the modem. The unit will then send the user-defined
modem command strings to make certain the modem is properly
disconnected and reinitialized.
• The Serial RS232 Ports can use the CMS-6R4's Internal Modem for
placing outbound calls. If an external modem is installed at a
CMS-6R4 Serial Port, other ports can use the modem for calling
out. To call out, invoke the /C command to connect to the port, then
access the modem as you normally would.
• If desired, the Invalid Access Lockout feature can provide
additional security for Modem Mode ports. When properly
configured, the Invalid Access Lockout will automatically shut
down a port whenever that port exceeds the user defined number
of invalid access attempts. For more information, please refer to
Section 5.5.2.3.