Nortel Networks 553-3001-211 manual Selecting the proper mode for Modem connectivity

Page 428 of 894 NT7D16 Data Access card

Table 152

DAC mode of operation selection (Part 5 of 5)

Service changeable downloadable parameters (LD 11)

Operation mode

Modem/

Gateway/

Host/KBD

Forced

DTR*

Hotline

Type of device to be connected

Group selection

DEM

PRM

DTR

HOT

14 (DCE)	ON	ON	OFF	Terminal similar to	Modes 12, 13, 14,
	“KBD On”	Forced	Not	ASIM when set to	and 15 are for
	(prompts		Hotline	forced DTR and	RS232 Terminal
	on)			Not Hotline	connectivity
					(similar to ASIM)
15 (DCE)	ON	ON	On	Continuous Hotline
	“KBD On”	Forced	Hotline	when DTR is ON
	(prompts
	on)

* Not prompted for Type = R422. Defaults for Type = R422: DEM = DCE and DTR = OFF.

Selecting the proper mode for Modem connectivity

Select modes 0, 1, 2, and 3 when the DAC is connected to different types of modems for inbound and outbound modem pooling. In these modes, the DAC operates as a DTE, monitors the DSR, DCD, and RI control leads, and drives the DTR lead. No menus are given and no characters are echoed when DCD is OFF. All prompts and messages are enabled for inbound calls and disabled for outbound calls.

In modes 0 and 1, the DAC drives the DTR lead OFF when in the idle state, and ON when processing an incoming or outgoing call.

In modes 2 and 3, the DAC drives the DTR lead ON except when the call is being disconnected. At disconnect, DTR is dropped for 0.2 seconds and then returns to ON.

553-3001-211 Standard 2.00 September 2004