Enterasys Networks Wireless Ethernet Adapter I Application Sensitivity Transmit Try Count Setting

Serial Line Replacement

∙Destination Address. This address tells the Ethernet Adapter where to send data received on the serial port. You may enter the RMP address of another Ethernet Adapter for direct serial line replacement. Other possible values are “dynamic” or “broadcast”. Entering “dynamic” causes data to be sent to the Ethernet Adapter from which the unit last received data. Using the value of “dynamic” is an easy way to allow two Ethernet Adapter units that are by themselves to communicate to each other. Entering “broadcast” causes the data to be sent to all Ethernet Adapter devices set to use RMP Pipe.

∙Transmit Try Count. For non-broadcast data, this count specifies the number of attempts that the Ethernet Adapter should make in transmitting each RMP packet of data. A transmission attempt may fail if the destination Ethernet Adapter is out of range or turned off. When this happens, the data will be lost if retry attempts are not made, or are not successful. The Transmit Try Count gives the user the ability to tell the Ethernet Adapter how diligently to attempt transmission of data. Note that subsequent RMP data transmissions are delayed until the packet being retried is successfully sent, or the maximum try count is reached. The maximum count is 65000 times. The default value is “infinite,” which causes each packet to be retried until successfully sent. Select the Transmit Try Count based on the sensitivity of your application to data delay and/ or data loss:

Application Sensitivity	Transmit Try Count Setting
Sensitive to data delay	Low transmit try count
Sensitive to data loss	High transmit try count

∙Transmit Retry Interval. When making additional transmit attempts as specified with “transmit try count” above, it is necessary to specify how long to wait between successive retry attempts. This setting determines the time period between retransmission attempts. The value is specified in 1/100ths of a second, so that a value of 100 means 1 second. The maximum value is 65000. The default value is 100.

∙I/O Control. I/O control is only relevant to serial line replacement applications that use the RMP protocol. I/O control defines control over digital inputs and outputs of the Ethernet Adapter separately from the data lines. Digital input and output are shared with the flow control lines (RTS, DTR, CTS, and DSR). In this mode the Ethernet Adapter does not interpret them as flow control signals. They provide the ability to send digital data from one device to another without interpretation by the Ethernet Adapters themselves. When an Ethernet Adapter detects a change in one of its RTS or DTR lines, it will cause the opposite Ethernet Adapter to immediately change the state of its corresponding CTS or DSR line to match. You can not use Hardware Flow control on lines that have been enabled for I/O Control.

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