Nortel Networks Circuit Card - Manual (Page 784)

Page 784 of 906 NTBK50 2.0 Mb PRI card
553-3001-211 Standard 3.00 August 2005
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.
Card-LAN interface
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.
Table 254
Settings for the DCHI dip switch (SW1)
Switch Function On Off
S1-1 — — —
S1-2 F/W Mode DPNSS DCHI