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

9-783EXP-INTF (Expansion Interface Circuit Pack)

9
Figure 9-38. Direct Connect Configuration with Duplicated PNCIn a duplicated PNC there is an A-side PNC and a B-side PNC. All EIs in this diagram are labeled with an A or a B to designate whic h PNC they are a part of. Note that the PNC designation (A or B) does not relate d irectly to carrier location . Again, only one of the EIs in an EPN can function as an archang el (TDM Bus Master). The EI that is on the active PNC and that is connected to the PPN is the only one that can function in this mod e. In normal operation, its yellow LED should be blinking at a rate of 2 seconds on and 200 ms. off.Figur e 9-3 9 shows the location of EIs in a typic al center stage switc h configuration with simplex PNC.
PPN
CAB 1
CARRIER D
CARRIER C
EPN
CAB 2
CARRIER B
CARRIER A
EPN
CAB 3
CARRIER B
CARRIER A
FIBER 1 (A)
FIBER 1 (B)
FIBER 2 (A)
FIBER 2 (B)
FIBER 3 (B)
FIBER 3 (A)
E E
E E
E E
E E
E E
E E
I I
I I
3 2
3 2
Slot #
Slot #
Slot #
2 1
2 1
2 1
2 1
Slot #
Slot #
Slot #
I I
I I
I I
I I
(A) (A)
(A) (A) (A) (A)
(B) (B) (B) (B)
(B) (B)