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PM5347 Datasheet(PDF) 237 Page - PMC-Sierra, Inc

Part # PM5347
Description  SATURN USER NETWORK INTERFACE PLUS
PDF  302 Pages
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Manufacturer  PMC [PMC-Sierra, Inc]
Direct Link  http://www.pmc-sierra.com
Logo PMC - PMC-Sierra, Inc

PM5347 Datasheet(HTML) 237 Page - PMC-Sierra, Inc

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PM5347 S/UNI-PLUS
DATA SHEET
PMC-941033
ISSUE 6
SATURN USER NETWORK INTERFACE PLUS
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
221
communication channels and provides full external control and observability of
the transport and path overhead bytes.
In Figure 13, the STS-1 mapping is displayed. The S/UNI-PLUS supports two
STS-1 mappings, one with the indicated stuff columns containing fixed stuff bytes
and the other with the indicated stuff columns used for ATM cells.
Figure 13
- STS-1 Mapping
Section
Overhead
Line
Overhead
Pointer
STS-1
Transport
Overhead
3
bytes
87 bytes
90 bytes
9
bytes
ATM Cell
ATM Cell
ATM Cell
Column 1
Column 30
Column 59
F
I
X
E
D
S
T
U
F
F
F
I
X
E
D
S
T
U
F
F
* Fixed stuff columns optionally filled with cells
A1
B1
H1
B2
J0
H3
K2
A2
H2
M0
E1 F1
D1 D2 D3
K1
D4 D5 D6
D7 D8 D9
D10 D11 D12
S1
E2
J1
G1
F2
B3
C2
H4
Z3
Z4
Z5
In Figure 14, the STS-3c (STM-1) mapping is shown. In this mapping, no stuff
columns are included in the SPE. The entire SPE is used for ATM cells.



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