Configuration
Serial Port Configuration
4-7
4.3 Serial Port Configuration
The serial port is set at the factory for 9600 baud, 8 data bits, one stop bit, and no parity.
Remember that the port should be logged out after configuration so the changes will go into
effect.
4.3.1 Access Mode
The serial port access mode governs which connections the port can accept. Local access
permits local logins on the serial port. Remote access allows network hosts to connect to
the MSS. Dynamic access (the default) allows both local and remote access. To change the
serial port’s access mode, enter the Change Access command.
Figure 4-13: Changing Serial Port Access Mode
If the attached serial device will be continuously transmitting data to the MSS, the MSS
port should be changed to Access Remote. This will prevent the MSS and serial device
from babbling to each other.
4.3.2 Autostart
Normally, the serial port will wait for a carriage return before starting a connection. When
the Autostart option is enabled, the MSS will establish a connection as soon as it boots (or
if modem control is enabled, as soon as the DSR signal is asserted). To control this feature,
enter the Change Autostart command.
Figure 4-14: Enabling Autostart
A port set for Autostart will never be idle, and therefore will not be available for network
connections. If network connections are desired, Autostart should remain disabled (the
default).
Autostart can also be triggered by a specific input character. There is no default Autostart
character, you will have to configure one. For example, when using Modem Emulation
Mode, you may want to use A so that Autostart will happen as soon as an AT modem
command is entered. See Enabling Modem Mode on page 5-10 for more information. Keep
in mind that when you configure an Autostart character, you can no longer use <CR> to get
to the Local> prompt.
Figure 4-15: Configuring an Autostart Character
Local>> CHANGE ACCESS LOCAL
Local>> CHANGE AUTOSTART ENABLED
Local>> CHANGE AUTOSTART CHARACTER “A”