Nortel Networks 553-3001-211 manual NT7D16 Data Access card Page 443

NT7D16 Data Access card Page 443 of 894

Dynamic control of DTR This feature is required only if the host must be capable of releasing an established call. The host should be able to drop an established data call by driving DTR OFF for more than 100 ms.

Note: If the PBDO parameter in LD 11 is ON, then Make Set Busy will be activated when DTR is driven OFF for more than five seconds.

In this mode, the DAC will not send any menus or prompts to the host. However, the host can still originate an outgoing call by blind-dialing (sending commands to the DAC without receiving echoes).

Programing DAC for mode 8 in service change LD 11 When used for inbound or outbound host access, the DAC can be configured as R232 or R422 in LD 11. When used for both inbound and outbound host access, the DAC must be configured as R232 or R422. When the DAC is programmed as station hunting, outbound host access should be in the opposite direction to the hunting for inbound host access.

Note: If CDR is required, use separate outbound and inbound host access.

Mode 9

This mode should be selected when the DAC is connected to a host and Hotline call origination is required. In this mode, the host will be able to Hotline to a specific data unit by simply driving the DTR lead ON. The transition of DTR from OFF to ON causes the DAC to Hotline to the Autodial DN. The hosts used with this mode should have the following characteristics.

Dynamic control of DTR for call origination The host should be capable of driving the DTR lead from OFF to ON to initiate the Hotline call. If the host always drives the DTR lead ON (not capable of dynamic control), mode 11 should be used.

Dynamic control of DTR for releasing established calls This feature is required only if it is required that the host be capable of releasing an established call. The host should be able to drop an established data call by driving DTR OFF for more than 100 ms.

Circuit Card Description and Installation