
1 8665 Smart Router Overview
Fig. 1 Equipped 8665 Smart Router Subrack
1.1.1
Backplane
8665 Smart Router uses a dual backplane architecture, which allows that all the cards are accessible
from the front panel. The backside of the subrack has a metal cover and all the interface connectors
are located on the front side. The signal backplane itself is passive and only provides connectors
and signal paths for high speed data packet transfer. Power distribution and low speed signaling
among the cards is handled by a separate backplane. The power backplane contains some passive
components for line termination, signal integrity purposes and the identi
fi
cation EEPROM.
The backplane data transmission architecture is based on differential signals in which the switch
cards are the center points for a dual star topology in a redundant con
fi
guration. There is also a
separate internal communication dual star bus topology between the units in the NE. This separate
control bus assures that the NE internal control is not lost even if the forwarding plane network
processors have problems. The other buses are power, synchronization (clock), fan module control
and unit presence busses.
8600 Smart Routers
76.8670-40128B
8665 Smart Router FP7.0 Reference Manual
© 2015 Coriant.
20