I have hardware where we have two ports that need to be connected back to back. One serial port is /dev/ttyAPP2 and other is /dev/ttyUSB0 Basically what I want to make happen is data coming from /dev/ttyUSB0 should be sent to /dev/ttyAPP2 and vice versa. It appears that I should be able to do this using the n_tracesink and n_tracerouter line discipline drivers. Has anyone been successful in hooking up serial ports back-to-back using these two line discipline drivers? /Subodh -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html