Nortel Networks 553-3001-211 manual Programing DAC for mode 5 in service change LD

Page 440 of 894 NT7D16 Data Access card

Mode 5

This mode should be selected when the DAC is connected to an auto-answer gateway for inbound Hotline operation. In this mode, the DAC automatically executes Hotline operation when DCD is driven ON by the gateway. If the DM being called by the Hotline operation is busy or not answering, the DAC will place repeated Hotline calls as long as the DCD lead is ON until the called unit answers. The gateway used in this mode should have the following features:

Auto-answer capability This feature is required when the gateway is used for inbound operation. It allows the gateway to drive the DCD lead ON when the inbound data call is pending. In addition, the gateway should auto-answer when the DTR lead is ON.

Dynamic control of DCD This feature must be supported by all gateways to be connected to the DAC. It allows the gateway to drive the DCD lead ON when the data call is established, and OFF when the data call is disconnected.

The baud rate of the Hotline call is determined by the AUTB and BAUD parameters in LD 11. The system should be programmed to allow inbound modem calls only.

Programing DAC for mode 5 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.

Mode 6

This mode should be selected when the DAC is connected to a gateway that requires DTR to be ON always except during call disconnection. In this mode, the DAC can be used for both inbound and outbound operations. The operation of this mode is similar to mode 4 except for the following:

•The DTR lead is ON in the idle state.

•The DTR lead will be dropped OFF for 0.2 seconds when an established call is disconnected.

553-3001-211 Standard 2.00 September 2004