For Tunneling, the Buffer Size of the buffer used for reading data on the Serial Line can be modified. The valid size range is from 1 to 4096 bytes. Changing this value requires a reboot.

A Read Timeout specifies how long to wait when waiting for incoming data on the Serial Line.

The Wait For Read Timeout boolean specifies to wait the entire Read Timeout when waiting for incoming data on the Serial Line. The waiting occurs even if there is data in the read buffer ready to be processed. Only when the read buffer completely fills up is the Read Timeout ignored.