CS19203CBI20 Datasheet, PDF (2/3 Pages) Applied Micro Circuits Corporation – Variable Rate Digital Wrapper Framer/Deframer, PM, and FEC Device

HUDSON 2.0
Variable Rate Digital Wrapper Framer/Deframer, PM, and FEC Device
General Description
Operating Frequencies
Digital Wrapper functionality is available on the Hudson without
regard to the actual data rate. The table below shows the supported
frequencies of operation for Digital Wrapper transponder and
SONET/SDH monitoring applications. Note that SONET/SDH moni-
toring is only supported for the OC-192 rate.
Mode
Frequency (Data Rate)
Digital
Wrapper
6.25 MHz (100 Mbps) to 693.483
MHz (11.096 Gbps)¹
SONET/
SDH Moni-
toring
622.08 MHz (9.95 Gbps) ONLY
1. Note: G.709 specifies exact rates for the Digital Wrap-
per. At the OTU2 rate, the frequency of the Hudson data
ports is 669.33 MHz. The Hudson can be safely run at
lower rates than specified in G.709 if compatibility to the
standard is not required.
Typical Full Duplex Application
In the Full-Duplex configuration, the encode side and decode side of
the Hudson can operate independently as shown below. At the input
to the encode side of the Hudson is a SONET monitor which can
verify the integrity of the SONET data stream prior to wrapping and
FEC. At the output of the decode side, another SONET monitor
Product Brief
Part Number S19203CBI20, Revision 1.3, May 2003
exists after decoding and deframing, to verify the integrity of the
wrapper's SONET payload before it exits the Hudson. Wrapper
overhead insertion and extraction, encoding and decoding, and per-
formance monitoring are carried out on the output and input data
streams respectively. The Hudson also contains many features to
help the user with device integration and line testing. The Hudson
high speed I/O is also compatible with the AMCC SONET/SDH
Mapper or Interleaver/Disinterleaver. A typical edge application is
shown below.
Typical Single-line Application
The following figures also illustrate a typical network application for
the Hudson supporting a single data stream with dual redundant
input and output lines. This configuration is useful for core transpon-
der applications where it is desired to correct errors and do perfor-
mance monitoring and output a corrected and FEC encoded data
stream with or without new Optical Channel Overhead (Digital
Wrapper OH) bytes. Data is received from the fiber and passed
through a Clock/Data Recovery device (CDR) and a demultiplexer
device to the Hudson. The Hudson optionally carries out SONET/
SDH monitoring, digital wrapper performance monitoring, error
checking, and overhead data extraction and insertion. Detected
errors and accumulated error counts can be accessed by the user
either through a processor interface, an FPGA interface, or in a
number of cases, from I/O pins. The data stream is then transmitted
out onto the fiber via a high-speed multiplexer and an optics device.
FEC decoding and encoding may be disabled individually.
Figure 2: Full-Duplex Configuration
Ring with NO
FEC Coding
ORX
DeMUX
(S3092)
OTX
MUX
(S3091)
ENCODER
S19203
DECODER
MUX
(S3091)
OTX
DeMUX
(S3092)
ORX
FEC Coded
Ring
O P T IC S M O D U L E
S 3092
C
O
N
N
E
C
T
O
R
S 3091
Figure 3: Typical Edge Application
S 19203
D EC
ENC
FPG A
U PRO CESSO R
G A N G E S / IN D U S
S 19202 / S 19201
2
Empowering Intelligent Optical Networks