AMT Datasouth 3300 manual Dtr, Rts, Cts, Dsr, Dcd

User’s Guide

SIGNAL	P/N	NO MODEM CONTROL	MODEM CONTROL
DTR	20	When the printer is ready to	When the printer is ready to
	11	accept data, this line will be high	accept data, this line will be high
		(+EIA LEVEL). This line will go	(+EIA LEVEL). This line will go
		low (-EIA LEVEL) when:	low (-EIA LEVEL) when:
		a. Print buffer is nearly full	a. Print buffer is nearly full
		(within 512 bytes)	(within 512 bytes)
		b. Paper out condition exists.	b. Paper out condition exists.
		c. Carriage jam condition	c. Carriage jam condition
		detected.	detected.
		d. Printer is off line.	d. Printer is off line.
RTS	4	This signal will always be held	RTS will be held high when the
		high	interface is ready to transmit data.
CTS	5	CTS is always assumed high	The interface will monitor the
			CTS signal generated by the host
			in response to RTS. When this
			signal goes on (high), the host is
			ready to receive data.
DSR	6	DSR is always assumed high	If DSR is low, the interface will
			ignore all data received on the
			serial port. This signal must hold
			high for the interface to receive
			and transmit data.
DCD	8	Same as DSR	Same as DSR

Interface Specifications B-9