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Serial Port Profiles
DTR Signal Acts as
RI
Specify this option to make the DTR signal always act as a RI signal.
Default: Disabled
RTS Signal Always
On
Specify this option to make the RTS signal always act as a RTS signal.
Default: Enabled
RTS Signal Acts as
DCD
Specify this option to make the RTS signal always act as a DCD signal.
Default: Disabled
RTS Signal Acts as
RI
Specify this option to make the RTS signal always act as a RI signal.
Default: Disabled
DCD Signal Always
On
When you configure the DTR or RTS signal pin to act as a DCD signal, enable
this option to make the DCD signal always stay on.
Default: Enabled
DCD Signal On
when host
connection
established
When you configure the DTR or RTS signal pin to act as a DCD signal, enable
this option to make the DCD signal active only during active communication.
Default: Disabled
Additional modem
initialization
You can specify additional virtual modem commands that will affect how
virtual modem starts. The following commands are supported: ATQn, ATVn,
ATEn, +++ATH, ATA, ATI0, ATI3, ATS0, AT&Z1, AT&Sn, AT&Rn,
AT&Cn, AT&F, ATS2, ATS12, ATO (ATD with no phone number), and
ATDS1.
See Appendix C, Virtual Modem AT Commands on page 361 for a more
detailed explanation of the support initialization commands.
Enable Message of
the Day (MOTD)
When enabled, displays the Message of the Day (MOTD) when a successful
virtual modem connection is made.
Default: Disabled
Enable TCP
Keepalive
Enables a per-connection TCP keepalive feature. After the configured number
of seconds, the connection will send a gratuitous ACK to the network peer,
thus either ensuring the connection stays active OR causing a dropped
connection condition to be recognized.
This parameter needs to be used in conjunction with
Monitor Connection
Status Interval
parameter found in the Serial, Advanced, Advanced Settings
tab. The interval specifies the inactivity period before "testing" the connection.
Default: Disabled
AT Command
Response Delay
The amount of time, in milliseconds, before an AT response is sent to the
requesting device.
Default: 250 ms