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

NT7D16 Data Access card Page 441 of 894

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

Circuit Card Description and Installation