14 Tunneling
Packing Mode
Packing Mode takes data from the serial port, groups it together, and sends it out to nodes on the network. The groupings may be configured by size or by time intervals.
The following settings are configurable for Packing Mode:
Disabled
Timeout: The data is packed for a specified period before being sent out.
Send Character: The data is packed until the specified send character is encountered.
Timeout: Specifies the time duration in milliseconds; applies only if the Packing Mode is Timeout.
Threshold: When the buffer fills to this specified amount of data in bytes(and the timeout has not elapsed), the XPort Pro packs the data and sends it out; applies only if the Packing Mode is not Disabled.
The send character: Similar to a start or stop character, the XPort Pro packs the data until it sees the send character. The XPort Pro then sends the packed data and the send character in the packet. Applies only if the Packing Mode is Send Character.
A trailing character: If a trailing character is defined, this character is appended to data put on the network immediately following the send character.
Modem Emulation
The XPort Pro supports Modem Emulation mode for devices that send out modem signals. There are two different modes supported:
Command Mode: sends back verbal response codes.
Data Mode: information transferred in is also transferred out.
It is possible to change the default settings for verbose response codes, echo commands, and quiet mode, by using Command Mode commands. The current settings can be overridden; however on reboot, it will go back to the programmed settings.
Configure the connect string as necessary. The connect string appends to the communication packet when the modem connects to a remote location. It is possible to append additional text to the connect message.
Command Mode
The Modem Emulation’s Command Mode supports the standard AT command set. For a list of available commands from the serial or Telnet login, enter AT?. Use ATDT, ATD, and ATDP to establish a connection:
All of these commands behave like a modem.
XPort Pro™ User Guide | 130 |
