PM8621 PMC-Sierra, Inc., PM8621 Datasheet - Page 15

• Manufacturer Part Number: PM8621
• Description: NSE-8G Standard Product Data Sheet Preliminary
• Manufacturer: PMC-Sierra, Inc.

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Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-2010850, Issue 1
Application Examples
Figure 1 illustrates an OC-48 SONET Ring Add/Drop Multiplexer. The PM5363 TUPP-622
devices align all paths to transport frames in preparation for VT1.5/VT2 granularity switching.
The PM8610 SBI336 Bus Serializer (SBS™) an PM8621 Narrowband Switching Element 8G
(NSE-8G™) devices support VT1.5/VT2 and above switching. The Add and Drop buses are
provided by the SBSs that are not in the SONET Ring path. In this case, they connect to T1 and
E1 mapper ports.
Figure 1 An OC-48 T1/E1 ADM (Individually Drop/Add any T1/E1 in STS-48)
Figure 2 illustrates another OC-48 SONET Ring ADM. In this application, the network of three
PM5310 TelecomBus Serializers (TBSs) from PMC-Sierra’s CHESS™ chip set add, drop, and
groom traffic at STS-1 granularities. The four TUPP-622 devices align any dropped STS-1s
(paths to transport frames). The virtual tributary (VT) or tributary unit (TU) switching solution is
provided by the SBS-NSE-8G-SBS network below the TUPP-622s. Four SBSs support up to an
STS-48 amount of add/drop traffic.
Figure 2 An OC-48 T1/E1 ADM (Drop/Add up to STS-48 at STS-1 Granularity)
SPECTRA-
SPECTA-
2488
2488
TBS
TUPP-
622
4 X
TUPP-
TBS
SBS
622
4 X
4 X
SBS
TBS
4 X
NSE8G
NSE20G
SPECTA-
2488
SBS
SBS
SBS
SBS
SBS
SBS
4 X
SBI device
SBI device
SBI device
SBI device
SBI device
SBI device
SBI device
SBI device
SBI device
SBI device
SBI device
SBI device
SBI device
SBI device
SBI device
SBI device
**
links for all 4 TEMAPS
42 required to terminate
NSE-8G™ Standard Product Data Sheet
TEMAP
TUPP-
622
4 X
4 X
-84
OCTAL
-LIU **
SPECTRA-
4 X
2488
Preliminary
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