Nortel Networks 553-3001-211 manual 670 of 894 NT8D41BA Quad Serial Data Interface Paddle Board

Page 670 of 894 NT8D41BA Quad Serial Data Interface Paddle Board

•NT6D39 CPU/Network module

•NT9D11 Core/Network module

The QSDI paddle board is compatible with all existing system software, but can only be used with the system options listed above. It does not support the 110 baud rate or the 20 mA current loop interface.

Physical description

The NT8D41BA Quad Serial Data Interface paddle board is a printed circuit board measuring 31.12 by 12.7 cm (12.25 by 5.0 in.). See Figure 158 on page 671.

The QSDI paddle board can be used in a system backplane for a total of four serial ports. Up to 12 other serial ports can be added by plugging standard serial cards into standard system slots. The serial ports on the card are addressed as a pair of consecutive addresses (0 and 1, 2 and 3, up to 14 and 15), using switches SW15 and SW16.

The front edge of the card has four serial port connectors, an Enable/Disable switch (ENB/DIS), and a red LED. The LED indicates the card status. It is lit when the following occurs:

•the ENB/DIS switch is set to disable

•all four ports are disabled in software

•all four ports are not configured in the configuration record

Functional description

The NT8D41BA QSDI paddle board has four asynchronous serial ports. These serial ports are connected to the I/O panel in the back of the shelf using special adapter cables. The serial ports can be used to connect the system to a terminal, a printer, a modem, or to an other system processor.

The QSDI paddle board design contains four Universal Asynchronous

Receiver/Transmitters (UARTs) and the logic necessary to connect the

UARTs to the system processor bus. See Figure 159 on page 672.

553-3001-211 Standard 2.00 September 2004