Avaya S8700 - Page 1489

EXP-INTF (Expansion Interface Circuit Pack)
Issue 1 May 2002
8-767555-233-143
Figure 8-37. Center Stage Switch Configuration with Duplicated PNC
In a duplicated center stage switch configuration, two EIs are needed in each port
network. 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. The PN’S EI circuit
packs are located in the first slot of the switch node carriers, although they may be
located in port carriers.
An 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 (DS1 CONV) circuit packs connected by
from 1 to 4 DS1 facilities. Figure 8-38 on page 8-768 shows where the DS1
converter complex fits into an EI-to-SNI or EI-to-EI fiber link. For more
information, see ‘‘DS1 CONV-BD’’ on page 8-683.
FIBER
FIBER
A-PNC
FIBER
FIBER FIBER
21
21
10
1 1
1 2 10
13
13 1 2 10 12
N N
N
N N N
N
I I I I I
I
I
I
I I
C C
C C
CARRIER D
SN #1
SN #1
CAB 1
CAB 1
CARRIER D
Slot #
Slot #
EPN EPN
CAB 2
CAB 2
CARRIER B
CARRIER B
CARRIER A CARRIER A
CAB 3
CAB 3
Slot #
Slot #
SN #2
SN #2
CAB 2
CAB 2
CARRIER E
CARRIER E
E
E
E
E
E
E
I
I I
I I
I
S S S S S S S
S S
S
S S S
S
N N N N N N N
1
2
2
2 10
13
13 2 1
20
20
B-PNC
METALLIC
METALLIC
CABLE
CABLE
FIBER