EXP-INTF (Expansion Interface Circuit Pack)
Issue 1 June 2005 1179
Figure 63 shows the location of EIs in a typical center stage switch configuration with
unduplicated PNC.
Figure 63: Center Stage Switch Configuration with Unduplicated PNC
For an unduplicated center stage switch configuration, only one EI is needed in each PN. Notice
that there is no direct connection between the PNs, rather every inter-PN connection is made
through the center stage switch. Each SNI in the switch node carriers can be connected to a PN
through an EI circuit pack.
Figure 64: Center Stage Switch Configuration with Duplicated PNC
on page 1180 shows the
location of EIs in a typical two Switch Node Center Stage Switch configuration with duplicated
PNC.
METALLIC
FIBER
Slot #
Slot #
Slot #
C
20 19 13 12 10 3 2
C C
C
N N N N N N
N N N N N N N
N
S S S S S S
S S S S S S S
S
CAB 3
I
1
1
I
E
E
CARRIER A
CARRIER A
CAB 2
EPN
EPN
I I I I
I I I I I
I
20 19 13 12 10 3
CARRIER C
CABINET 1
PPN
2
CAB 2
SN #2
CARRIER E
CARRIER E
CAB 1
SN #1
2 1
FIBER
FIBER