Nortel Networks 553-3001-211 Hotline originated by terminal, Terminal access for call origination

NT7D16 Data Access card Page 459 of 894

Table 153

Connect and disconnect protocol (Part 11 of 12)

Mode of
operation	Interface application	Comments
		Call disconnection (terminal):
		Terminal toggles DTR from ON to OFF (DTR must
		be OFF for 100 ms or more). The DAC turns DSR,
		DCD, and CTS OFF for 0.2 second and then ON.
		Terminal sends a long break or three short
		breaks. The DAC turns DSR, DCD, and CTS OFF
		for 0.2 second and then ON.
Mode 13	Hotline call origination	Hotline originated by terminal:
		DAC drives DSR, DCD, and CTS ON in the idle
		state.
		Terminal toggles DTR from OFF to ON to initiate
		Hotline call.
		DAC responds by trying to establish a Hotline call
		to a specific DM (Autodial).
		If Data Module is busy or not responding, the DAC
		requires another transition of DTR from OFF to
		ON to initiate another Hotline call. If the terminal
		keeps DTR ON, the DAC does not try to establish
		another Hotline call unless the terminal sends a
		<CR> while DTR is ON.
		Call disconnection:
		Disconnection is identical to mode 12.
Mode 14	Terminal access for call	Terminal access for call origination and
	origination and answering	answering:
	(with forced DTR)	The DAC operation is identical to mode 12 except
		that DTR is considered to be always ON, even
		when the terminal is driving DTR OFF.

Circuit Card Description and Installation