Nortel Networks Circuit Card User Manual
Page 879
QPC841 Quad Serial Data Interface card
Page 879 of 906
Circuit Card
Description and Installation
DTE/DCE mode switch settings
Table 277 shows the DTE/DCE mode selection switches for the four serial
ports.
Test switch setting
Switch SW16 is only used for factory testing; all of its switches must be set
to OFF for proper operation.
Table 277
QSDI card DTE/DCE mode switch settings
Port 1 – SW8
Port1 – SW9
Mode
1
2
3
4
5
6
1
2
3
4
5
6
DTE (Terminal)
on
on
on
on
on
on
off
off
off
off
off
off
DCE (Modem)
off
off
off
off
off
off
on
on
on
on
on
on
Port 2 – SW6
Port 2 – SW7
Mode
1
2
3
4
5
6
1
2
3
4
5
6
DTE (Terminal)
on
on
on
on
on
on
off
off
off
off
off
off
DCE (Modem)
off
off
off
off
off
off
on
on
on
on
on
on
Port 3 – SW4
Port 3 – SW5
Mode
1
2
3
4
5
6
1
2
3
4
5
6
DTE (Terminal)
on
on
on
on
on
on
off
off
off
off
off
off
DCE (Modem)
off
off
off
off
off
off
on
on
on
on
on
on
Port 4 – SW2
Port 4 – SW3
Mode
1
2
3
4
5
6
1
2
3
4
5
6
DTE (Terminal)
on
on
on
on
on
on
off
off
off
off
off
off
DCE (Modem)
off
off
off
off
off
off
on
on
on
on
on
on