Nortel Circuit Card Installation Manual page 784

Page 784 of 906
Card-LAN interface
553-3001-211 Standard 3.00
NTBK50 2.0 Mb PRI card
mode, which is not supported at this time. The DDCH supports only a single
port which directly interfaces to the PRI motherboard. See Table 254.
Table 254
Settings for the DCHI dip switch (SW1)
Switch
S1-1
S1-2
A Dual Port UART handles the functions of the serial ports for the Card-LAN
serial link test port interface. The test interface is an asynchronous 4800 bps
8 bit connected to port A of the UART. The card-LAN interface is an
asynchronous 19.2 kbps 9 bit start/stop connected to port B of the UART.
The connection to the test port is available at the backplane/MDF connector.
The signals at this port conform to the EIA RS-232C standard.
August 2005
Function
—
F/W Mode
On
—
DPNSS
Off
—
DCHI