Yamaha ERCX, DRCX, SRCD, SRCX user manual Program

CHAPTER2 Ethernet Unit

No.	Symptom		Probable causes	Checkpoints	Action
4	Program	1)	TELNET		• Always use a LOGOUT or BYE
	stops by itself		communication		command to terminate a TELNET
	during		cuts off by itself		communication.
	automatic		without a
	operation.		LOGOUT or
			BYE command
			being issued.
		2)	TELNET	• Check the TELNET parameter to find	• Reset the parameter so operation
			parameter was	if it was set to stop operation during	continues during logout.
			set to stop	logout.
			operation during
			logout.
		3)	Communication	• Check the TELNET parameter to find	• Set so communication time does not
			status continues	if communication status is longer than	exceed the timeout limit. Otherwise
			for a fixed period	the time set for timeout.	increase the communication timeout
			and then cuts off		period or disable the timeout function.
			automatically at
			timeout.
		4)	No-response	• Check if a cable is detached or power	• Check the network and repair/restore
			status continues	supply for the HUB or other equipment	any problem locations.
			for a fixed period	is off.	• Replace a device having operating
			versus the keep-	• Check if operating problems are	errors with another device.
			alive packet and	occurring in devices such as the HUB	• Set the no-response timeout period to
			then cuts off	due to noise, etc.	match the network structure and traffic
			automatically at	• Too short of a period was set for the	conditions. Or disable the timeout
			timeout.	no-response timeout period.	function.
		5)	Ethernet unit is	• Try substituting with another Ethernet	• If operation returns to normal, then the
			defective.	unit.	Ethernet unit is defective so replace it.

34