Nortel Circuit Card, Installation Manual, Page: 455 / 908

NT7D16 Data Access card Page 455 of 906
Circuit Card Description and Installation
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.