Nortel Networks 553-3001-211 manual Programing DAC for mode 12 in service change LD

Page 446 of 894 NT7D16 Data Access card

Figure 91

DAC to Terminal connectivity

Terminal (DTE)

pin 2 pin 3 pin 5 pin 6 pin 7 pin 8 pin 20 pin 22

RS- 232 leads

>>>

<<<

<<<

<<<

<<<

>>>

<<<

DAC (DCE)

TX

RX

CTS

DSR

GND

DCD

DTR

RI

not required for mode 14

553-5220

unless the DTR lead is driven ON by the terminal. Any terminal that drives the DTR lead ON can be used with this mode (such as VT100 or VT102).

The DAC drives CTS, DSR, and DCD ON, except when a call is dropped or when control—Z is entered during the idle state. In this case, the DAC drives those leads OFF for 0.2 seconds and then ON. When the DTR lead is driven OFF by the terminal, the DAC does not execute autobaud, nor will it respond to any command.

Note: If the PBDO parameter in LD 11 is ON, then Make Set Busy will be activated when DTR is driven OFF for more than five seconds.

Programing DAC for mode 12 in service change LD 11

The DAC must be configured as R232 or R422 since Autodial, Speed Call, and Display commands are likely to be used.

553-3001-211 Standard 2.00 September 2004