A SERVICE OF

logo

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 PNC
In a simplex stage switch configuration, only one EI is needed in each port
network. Notice that there is no direct connection between the EPNs, rather all
inter-EPN connections are made through the stage switch. Each SNI in the switch
node carriers can be connected to an EPN through an EI circuit pack.
Figure 9-40
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