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NT7D16 Data Access card Page 441 of 894
Circuit Card Description and Installation
Programing DAC for mode 6 in service change LD 11
When used for inbound or outbound gateway access, the DAC can be
configured as R232 in LD 11. When used for both inbound and outbound
gateway access, the DAC must be configured as R232. When the DAC is
programmed as station hunting, outbound gateway access should be in the
opposite direction to the hunting for inbound gateway access. See Figure 89
on page 439 for more details.
Note: If CDR is required, use separate outbound and inbound gateway
access.
Mode 7
This mode should be selected when the DAC is connected to a gateway for
inbound Hotline operation. The operation of this mode is similar to mode 5
except for the following:
• The DTR lead is ON in the idle state.
• The DTR lead will be dropped OFF for 0.2 second when an established
call is disconnected.
The baud rate of inbound Hotline calls is determined by programmable
database. The system should be programmed to allow inbound calls only on
the DAC unit.
Programing DAC for mode 7 in service change LD 11
The DAC must be configured as R232 (the Autodial feature is used for this
mode). The DAC must not be configured as an ADM trunk.
Selecting the proper mode for Host connectivity
Select modes 8, 9, 10, and 11 when the DAC is connected to different types
of hosts (DTE). In these modes, the DAC operates as a DCE and drives DSR,
DCD, and RI control leads (see Figure 90 on page 442). CTS, DSR, and DCD
are driven OFF in the idle state.
The DAC will not send any menu or prompt to the host, nor will it echo any
command sent from the host. The CTS, DSR, and DCD will be driven ON
until the call is released. An incoming call to the DAC causes the RI lead to