Nortel Networks Circuit Card - Manual (Page 473)

NT7D16 Data Access card Page 473 of 906
Circuit Card Description and Installation
• Autoparity to ensure that the keyboard dialing menu is readable on the
data terminal during the interactive dialogue mode
• Originating calls to local and remote hosts
• Ring Again
• Speed Call
• Two answer modes for incoming calls: manual and auto
• Digit display
• Dialing by mnemonic
Initiating conditions
In order for the DAC to respond to user commands/entries, the following
conditions must be met:
• The DAC must be active (power ON), and have successfully received the
downloaded parameters from the system.
• The user equipment must be active, and, if in RS-232-C mode, must
assert these control lines
— DCE mode: DTR (unless Forced DTR has been software selected)
— DTE mode: RI has cycled the appropriate number of times
Echo
During call setup (dialogue phase), all user input is echoed back to the user
equipment. Once the call is established, the DAC is transparent to data
communication. To get echoed characters after a call is established, the far
end must provide the echo.
Note: When RS-232-C modes 12-15 (Host modes) are selected, there is
no echo during dialogue phase.