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PM7347 Datasheet(PDF) 262 Page - PMC-Sierra, Inc

Part # PM7347
Description  SATURN USER NETWORK INTERFACE for J2/E3/T3
PDF  341 Pages
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Manufacturer  PMC [PMC-Sierra, Inc]
Direct Link  http://www.pmc-sierra.com
Logo PMC - PMC-Sierra, Inc

PM7347 Datasheet(HTML) 262 Page - PMC-Sierra, Inc

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S/UNI®-JET Data Sheet
Released
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
262
Document ID: PMC-1990267, Issue 3
Figure 8 DS3 PLCP Frame Format
A1
A2
P11 Z6
ATM Cell
A1
A2
P10 Z5
A1
A2
P9
Z4
A1
A2
P8
Z3
A1
A2
P7
Z2
A1
A2
P6
Z1
A1
A2
P5
F1
A1
A2
P4
B1
A1
A2
P3
G1
A1
A2
P2
M2
A1
A2
P1
M1
A1
A2
P0
C1
Trailer
ATM Cell
ATM Cell
ATM Cell
ATM Cell
ATM Cell
ATM Cell
ATM Cell
ATM Cell
ATM Cell
ATM Cell
ATM Cell
PLCP
Fram e Rate
125 µs
53 octets
POH
13 or 14
nibbles
Framing
(3 octets)
The DS3 PLCP frame provides the transmission of 12 ATM cells every 125 µs. The PLCP frame
is nibble aligned to the overhead bits in the DS3 frame; however, there is no relationship between
the start of the PLCP frame and the start of the DS3 M-frame. A trailer is inserted at the end of
each PLCP frame. The number of nibbles inserted (13 or 14) is varied continuously such that the
resulting PLCP frame rate can be locked to an 8 kHz reference.
Figure 9 DS1 PLCP Frame Format
A1
A2
P9
Z4
A1
A2
P8
Z3
A1
A2
P7
Z2
A1
A2
P6
Z1
A1
A2
P5
F1
A1
A2
P4
B1
A1
A2
P3
G1
A1
A2
P2
M2
A1
A2
P1
M1
A1
A2
P0
C1
Trailer
ATM Cell
ATM Cell
ATM Cell
ATM Cell
ATM Cell
ATM Cell
ATM Cell
ATM Cell
ATM Cell
ATM Cell
PLCP
Fram e Rate
3 ms
53 octets
POH
Framing
(3 octets)
6 octets



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