PM5380-BI PMC-Sierra, Inc., PM5380-BI Datasheet - Page 380
PM5380-BI
Manufacturer Part Number
PM5380-BI
Description
Network Interface, SATURN User Network Interface (8x155) Telecom Standard Product
Manufacturer
PMC-Sierra, Inc.
Datasheet
1.PM5380-BI.pdf
(440 pages)
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Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC- 2010299, Issue 2
13.1 SONET/SDH Frame Mappings and Overhead Byte Usage
13.1.1
13.1.2
13
Operation
ATM Mapping
The S/UNI-8x155 processes the ATM cell mapping for STS-3c/STM-1 as shown below in
Figure 15. The S/UNI-8x155 processes the transport and path overhead required to support
ATM UNIs and NNIs. In addition, the S/UNI-8x155 provides support for the APS bytes, the
data communication channels and provides full control and observability of the transport and
path overhead bytes through register access. In Figure 15, the STS-3c/STM-1 mapping is
shown. In this mapping, three stuff columns are included in the SPE. No other options are
provided.
Figure 15 ATM Mapping into the STS-3c/STM-1 SPE
Packet over SONET/SDH Mapping
The S/UNI-8x155 processes the Packet over SONET/SDH mapping for STS-3c/STM-1 as
shown below in Figure 16. The S/UNI-8x155 processes the transport and path overhead
required to support Packet over SONET/SDH applications. In addition, the S/UNI-8x155
provides support for the APS bytes, the data communication channels and provides full control
and observability of the transport and path overhead bytes through register access. In Figure 16,
the STS-3c/STM-1 mapping is shown. In this mapping, the entire SPE is used for POS Frames.
Figure 16 POS Mapping into the STS-3c/STM-1 SPE
Overhead
Overhead
Overhead
Overhead
Overhead
Overhead
Transport
Transport
Section
Section
Pointer
Pointer
Line
Line
B3
C2
G1
H4
B3
C2
G1
H4
J1
F2
Z3
Z4
Z5
J1
F2
Z3
Z4
Z5
POS Frame
ATM Cell
POS Frame
S/UNI®-8x155 ASSP Telecom Standard Product Data Sheet
270 Bytes
261 Bytes
270 Bytes
261 Bytes
ATM Cell
POS Frame
POS Frame
ATM Cell
Released
380
Bytes
Bytes
9
9
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