Nortel Networks 553-3001-211 manual Host access for call origination and answering, Hotline mode

NT7D16 Data Access card Page 457 of 894

Table 153

Connect and disconnect protocol (Part 9 of 12)

Mode of
operation Interface application	Comments

Mode 10 Host access for call origination and answering (with forced DTR)

Host access for call origination and answering:

The DAC operation is identical to mode 8 except DTR is always considered ON, even when the Host is driving DTR OFF.

Call disconnection:

		DAC drops DSR, DCD, and CTS if the local DM
		user releases the call. The Host should then drop
		the call.
		DAC drops DSR, DCD, and CTS if the Host sends
		a long break or three short breaks. The Host
		should then drop the call.
Mode 11	Hotline call origination	Hotline origination by Host (continuous
	(Virtual Leased Line)	Hotline mode):
		The DAC operation is similar to mode 9 except the
		Host initiates the Hotline call by driving DTR ON.
		However, if the DM is busy or not answering, the
		DAC will continuously try to originate Hotline calls
		once every 40 seconds (as long as DTR stays
		ON) until the called DM answers the call.
		Call disconnection:
		Disconnection is identical to mode 8.

Circuit Card Description and Installation