Nortel Networks 553-3001-211 manual 656 of 894 NT8D41AA Serial Data Interface Paddle Board

Page 656 of 894 NT8D41AA Serial Data Interface Paddle Board

•NT6D39 CPU/Network module

•NT9D11 Core/Network module

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

Physical description

The NT8D41AA 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 154 on page 657.

Up to two paddle boards 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 two serial ports on each card are addressed as a pair of consecutive addresses (0 and 1, 2 and 3, up to 14 and 15).

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

•the ENB/DIS switch is set to disable

•both ports are disabled in software

•the ports are not configured in the configuration record

553-3001-211 Standard 2.00 September 2004