Demand test descriptions and error codes - Avaya Support

Figure 28: Center Stage Switch Configuration with Duplicated PNC
FIBER
FIBER
SN #1 E S S S S
SN #2 S S S
CAB 1 I N N N N
CAB 2 N N N
CARRIER D I C I I CARRIER D I
C I
METALLIC
CABLE
1 2 10 13 20 21 Slot #
1 2
10
13
METALLIC
CABLE
FIBER
EPN EPN
E
E
CAB 2
I CAB 3
CARRIER B I
CARRIER B
E
I
E
CAB 2
CAB 3
CARRIER A I CARRIER A
Slot #
1 1
A-PNC
In a duplicated center stage switch configuration, two EIs are needed in each PN. One resides
in the PNC’s A side and one in the B side. Note that a PNC designation (A or B) does not
directly designate the carrier where an EI resides. The active PNC’s EI is the one acting as the
PN’s Archangel (TDM bus master). This EI’s amber LED should be blinking at a rate of
2 seconds on and 200 ms off. Whereas, the amber LED on standby PNC’s EI should be off.
A PN (and thus, the EIs contained within it) can be remoted via a DS1 Converter complex. This
requires that a fiber link (providing connectivity to the remoted PN) be administered with an
associated DS1 Converter complex. This complex consists of two TN574 DS1 Converter
(DS1C-BD) circuit packs connected by from 1 to 4 DS1 facilities. Figure 29: Fiber Link with
DS1 Converter Complex shows where the DS1 converter complex fits into an EI-to-SNI or
EI-to-EI fiber link. For more information, see DS1C-BD (DS1 Converter Circuit Pack).
430 Maintenance Alarms for Communication Manager, Media Gateways and Servers
2
FIBER
B-PNC
FIBER
SN #1 E S S S S
SN #2 S S S
CAB 1 I N N N N
CAB 2 N N N
CARRIER E I C I I CARRIER E I
C I
Slot #
Slot #
1 2 10 13 20 21
1 2 10 12 13
FIBER
2