3Com 10014299 manual Parity even mark none, Odd space, Stopbits 1 1.5, Databits 5 6 7

Asynchronous Serial Interface 121

When the link establishment mode of async serial interface is flow or TTY, the two ends of the link will interact with each other after the setup of a physical connection. The calling end will send configuration command to the receiving end and set the interactive parameters of link layer protocol on the receiving end before the establishment of the link. In practical application (such as terminal server), the router will send configuration command to the terminal and transmit interactive operating parameters of the link layer that are set at local end to the opposite end.

This command is used to set the interactive operating parameter of the link layer protocol ---check mode.

Please perform the following configuration in asynchronous serial interface view.

Table 101 Set the check mode when the async serial interface works in flow mode

Operation	Command
Set the check mode when the async serial	parity { even mark none
interface works in flow mode	odd space }

By default, none is adopted for non-parity check.

9Set stop bit in flow mode

This command is used to set another interactive operating parameter of the link layer protocol---the stop bit.

Please perform the following configuration in asynchronous serial interface view.

Table 102 Set the stop bit when the asynchronous serial interface works in flow mode

Operation	Command
Set the stop bit when the asynchronous serial interface	stopbits { 1 1.5 2 }
works in flow mode

By default, there is only 1 stop bit.

10Set data bit in flow mode

This command is used to set another interactive operating parameter of the link layer protocol--- the data bit.

Please perform the following configuration in asynchronous serial interface view.

Table 103 Set the data bit when the asynchronous serial interface works in flow mode

Operation	Command
Set the data bit when the asynchronous serial interface	databits { 5 6 7 8 }
works in flow mode

5, 6, 7 and 8 stand for 5, 6, 7 and 8 data bits respectively. By default, there are 8 data bits.

11Enable or disable level detection

If the level detection is disabled for the asynchronous serial interface, the system will only detect whether the asynchronous serial interface connects cables externally and automatically report its state (UP or DOWN) to the user. If the level detection is enabled, the system will detect DSR signal in addition to the above-mentioned detection. Only when this signal is effective will the system regard the asynchronous serial interface as UP. Otherwise, it is regarded as DOWN.