DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Maintenance Object Repair Procedures

9-784EXP-INTF (Expansion Interface Circuit Pack)

9
Figure 9-39. Center Stage Switch Configuration with Simplex PNCIn a simplex stage switch configuration, only one EI is needed in each port network. Notice that there is no direct c onnection between the EPNs, rather all inter-EPN connections are made through the stag e switch. Each SNI in the switch node carriers can b e connected to an EPN through an EI circ uit pack.Figur e 9-4 0 shows the location of EIs in a typic al two Switch Node Center Stage Switch configuration with dup licated PNC.
METALLIC
FIBER
Slot #
Slot #
Slot #
C
20 19 13 12 10 3 2
C C
CN N N N N N
N N N N N N N
NS 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