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C: Networking and Security
EDS Device Servers User Guide 147
To clear out data from the serial buffers upon disconnecting, configure the EDS to flush
serial data (see Tunnel – Disconnect Mode Page on page 62.
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:
Enable or disable Packing mode
Packing mode timeout. Data that is packed for a specified period of time before
being sent out.
Packing mode threshold. When the buffer fills to a specified amount of data and
the timeout has not elapsed, the EDS packs the data and sends it out.
Send character. Similar to a start or stop character, the EDS packs data until it
sees the send character. When it sees the send character, the EDS sends the
packed data and the send character in the packet.
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 EDS supports Modem Emulation mode for devices that transmit modem AT
commands. The EDS supports two different modes:
Command Mode: The EDS serial ports accept modem commands that instruct
the EDS to perform an action such as start or drop a connection.
Data Mode: Serial data received in the EDS serial port is sent through the active
network connection.
The Tunnel – Modem Emulation page lets you configure modem emulation settings for
up to four tunnels for the EDS4100, 16 for the EDS16PR, and 32 for the EDS32PR (see
Tunnel – Modem Emulation Page on page 65). Each tunnel can have different settings.
Note: When the EDS serial port is in Modem Emulation mode, the serial port
remains in Command mode until an active tunnel starts. Once an active tunnel
starts, the serial port remains in Data mode until the connection is dropped or the
serial port is placed in Command mode by issuing the modem command +++.