Nortel Networks 1000 - Manual (Page 733)

Connector pin assignments 733
it to work when either of the system processors is active. Installing the
paddle board into a socket in the CPU area of the backplane allows it to
work only when that CPU is active.
The QSDI paddle board is normally installed into a socket in the network
area of the backplane. This allows it to be accessed by either of the
system processors. This is necessary because the active CPU switches
automatically each night at midnight and whenever a fault occurs on the
active CPU card.
The QSDI paddle board can also be installed into a socket in the CPU
area of the backplane (supported in NT6D39AA shelves only). This is
done when performing maintenance or an upgrade on the Meridian 1
system.
The QSDI paddle board is plugged into the CPU that is not the active
system CPU. One of the serial ports on the QSDI paddle board is then
connected to a maintenance terminal and the CPU board is put into
maintenance mode. Diagnostics can then be run from the maintenance
terminal without having to stop the system. This is also used to perform a
parallel reload of the system software without affecting the operation of the
switch.
Connector pin assignments
The RS-232-C signals for port 1 through port 4 are brought out on
connector J1 through J4 respectively. The pinouts for each port are
identical to those for each of the other three ports.
Table 291 "Connectors
J1, J2, J3, and J4 pin assignments" (page 734) shows the pin assignment
that applies to each connector.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.