8: Device Ports
SecureLinx SLC User Guide
68
Mode
The format in which the data flows back and forth:
Text:
In this mode, the SLC assumes that the modem will
be used for remotely logging into the command line. Text
mode can only be used for dialing in or dialing back.
Text
is the default.
PPP:
This mode establishes an IP-based link over the
modem. PPP connections can be used in dial-out mode
(e.g., the SLC connects to an external network), dial-in
mode (e.g., the external computer connects to the network
that the SLC is part of), or dial-on-demand.
Initialization Script
Commands sent to configure the modem may have up to
100 characters. Consult your modem’s documentation for
recommended initialization options. If you do not specify
an initialization script, the SLC uses a default initialization
string of
AT S7=45 SO=0 L1 V1 X4 &D2 &c1 E1 Q0
.
Note:
We recommend that the modem initialization script
always be preceded with AT and include E1 V1 x4 Q0 so
that the SLC may properly control the modem.
Caller ID Logging
Select to enable the SLC to log caller IDs on incoming
calls. Disabled by default.
Note:
For the Caller ID AT command, refer to the modem
user guide
.
Modem Command
Modem
AT
command used to initiate caller ID logging by
the modem.
Note:
For the AT command, refer to the modem user
guide
.
Modem Settings: Text Mode
Timeout
Logins
If you selected
Text
mode, you can enable logins to time
out after the connection is inactive for a specified number
of minutes. The default is
No
. This setting is only
applicable for text mode connections.
PPP
mode
connections stay connected until either side drops the
connection. Disabled by default.
Dial Back
Number
Users with dial-back access can dial into the SLC and
enter their login and password. (See
Setting up Local
Users
on page 94.) Once the SLC authenticates them, the
modem hangs up and dials them back.
Select the phone number the modem dials back on a fixed
number or a number associated with their login. If you
select Fixed
Number
, enter the number (in the format
2123456789).
Modem Settings: PPP Mode
Negotiate IP
Address
If the SLC and/or the serial device have dynamic IP
addresses (e.g., IP addresses assigned by a DHCP
server), select
Yes
.
Yes
is the default.
If the SLC or the modem have fixed IP addresses, select
No,
and enter the local IP (IP address of the port) and
remote IP (IP address of the modem).
