Nortel Networks Circuit Card User Manual

 NT7D16 Data Access card

Keyboard dialing is an interactive dialogue mode between the connected 
equipment and the DAC. This dialogue allows equipment to give dialing 
commands to the DAC in order to make a data call to another far-end data 
port. Keyboard dialing supports a modify mode that allows the user to modify 
certain dialing parameters.

The following keyboard dialing features are supported with the DAC:

•

Autobaud from 110 to 19200 bps

If the local DM user drops the call, the DAC turns 
DSR, DCD, and CTS OFF for 0.2 second and 
then ON.

The terminal sends a long break or three short 
breaks. The DAC turns DSR, DCD, and CTS OFF 
for 0.2 second, and then ON.

Mode 15

Hotline call origination 
(Virtual Leased Line)

The DAC operation is similar to mode 13 except 
the terminal initiates the Hotline call by driving 
DTR ON. However, if the called DM is busy or not 
answering, the DAC will continuously try to 
originate Hotline calls once every 40 seconds (as 
long as DTR remains ON) until the Data Module 
answers the call.

Disconnection is identical to mode 12.