A response of Lost Comm with Host indicates that the communication between the terminal and the host has been interrupted.

Terminal Response	Probable Cause	Action Taken
Lost Comm with Host	Some other device at the location is attempting to access the line.	Remove all other devices from the line.
	Call waiting has interrupted the communication.	Put *70 in front of the number to disable call waiting.
	Excessive static on the line.	Have the telephone service provider test the line, and repair as necessary.