Lucent Technologies Release 7 Manual

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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 PNC

In 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 which PNC they are a part of.

Note that the PNC designation (A or B) does not relate directly to carrier location.

Again, only one of the EIs in an EPN can function as an archangel (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 mode. In normal operation, its yellow LED

should be blinking at a rate of 2 seconds on and 200 ms. off.

Figure 9-39

shows the location of EIs in a typical center stage switch

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)