Demand test descriptions and error codes - Avaya Support

Figure 26: Direct Connect Configuration with Duplicated PNC shows the location of EI circuit
packs in a typical duplicated PNC, direct-connect configuration.
Figure 26: Direct Connect Configuration with Duplicated PNC
Slot #
Slot #
FIBER 1 (A)
E E
I I
In a duplicated PNC there is an A-side and a B-side PNC. Every EI in this diagram is labeled
with an A or a B designating to which PNC it belongs. Note that a PNC’s designation (A or B)
does not relate directly to the carrier where its EIS reside. Again, only one of a PN’s EIs can
function as the Archangel (TDM-bus master). A PN’s EI that is:
● On the active PNC
1
E E
I I
1
2
2
Slot #
Slot #
FIBER 1 (B)
FIBER 3 (B)
EPN
CAB 2
CARRIER B
CARRIER A
FIBER 3 (A)
PPN
CAB 1
CARRIER C
CARRIER D
FIBER 2 (A)
● Logically connected to the server
is the only one that can function in this mode. In normal operation, its amber LED should be
blinking at a rate of 2 seconds on and 200 ms off.
Figure 27: Center Stage Switch Configuration with Unduplicated PNC shows the location of EIs
in a typical center stage switch configuration with unduplicated PNC.
428 Maintenance Alarms for Communication Manager, Media Gateways and Servers
E E
I I
(B) (B)
2
E E
I I
2
3
(A) (A)
3
Slot #
Slot #
E E
I I
(B) (B)
(B) (B)
1
E E
I I
(A) (A) (A) (A)
1
2
2
EPN
CAB 3
CARRIER B
CARRIER A
FIBER 2 (B)