Nortel Networks 553-3001-211 manual Operating modes, Independent storage of dialing parameters

NT7D16 Data Access card Page 423 of 894

Independent storage of dialing parameters

Two dialing parameters, DCD control, and Answer mode, can be modified by both keyboard and Hayes dialing commands.

The Hayes dialing mode also allows the user to modify the Input echo control, and Prompt/Result codes transmit control. With keyboard dialing, the Input echo control and Prompt/Response codes control are determined by the downloaded parameters. They cannot be altered through dialing commands.

The DAC maintains separate buffers for keyboard and Hayes dialing modes. Changes made to a given parameter in one mode do not affect that parameter in the other mode. When a dialing mode is selected, the DAC copies the corresponding dialing parameters into the active buffer. This buffer controls the call processing.

If the DAC receives an incoming call while idle, the most recent dialing mode is used to answer the call.

User input

User input may include either upper or lower case ASCII characters.

All entries are accumulated in an input record. This record is completed with a Terminator character. For keyboard dialing, this character is always <CR>; for Hayes dialing, it can be user defined (but default to <CR>). The entries are not processed until the Terminator character is received.

The input record is limited to 43 characters, including the Terminator, but excluding any ignored space characters.

The record can be edited by using the backspace and escape characters.

Operating modes

There are sixteen possible RS-232-C operating modes with three basic common modes of operation which correspond to three types of equipment connected to the DAC. The three modes are: modem, terminal, and host. Host mode is a subset of the terminal mode, which only suppresses the prompts at the terminal.

Circuit Card Description and Installation