CS4815 AMCC [Applied Micro Circuits Corporation], CS4815 Datasheet - Page 3

• Manufacturer Part Number: CS4815
• Description: OC-48/12/3 DW/FEC/PM and ASYNC Mapper Device with Strong FEC
• Manufacturer: AMCC [Applied Micro Circuits Corporation]

RUBICON-48
OC-48/12/3 DW/FEC/PM and ASYNC Mapper Device with Strong FEC
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pursuant to its terms and conditions of sale, only to substantially comply with the latest available datasheet. Please consult AMCC’s Terms and
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without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing orders, that the information is
current. AMCC does not assume any liability arising out of the application or use of any product or circuit described herein, neither does it convey
any license under its patent rights nor the rights of others. AMCC reserves the right to ship devices of higher grade in place of those of lower grade.
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LIFE-SUPPORT APPLICATIONS, DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS.
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215 Moffett Park Drive • Sunnyvale, CA 94089 • Tel: [phone] • Fax: [phone] • http://
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FORWARD ERROR CORRECTION CAPABILITY
Two FEC options are supported on the line side. The Rubicon-
48 can support standard RS(255,239) FEC compliant with
G.709, G.975, and compatible with the AMCC Hudson device.
The device can also support an enhanced FEC algorithm that
is applied using the same G.709 frame structure and rate as
the Hudson but providing more than 2 dB of additional coding
gain (*measured at a BER of 10
will operate in a mode where both encoders and decoders are
working simultaneously, allowing for a single chip transponder
to operate between two networks with different gain character-
istics.
LEGACY COMPATIBILITY
As indicated above, the Rubicon-48 also supports operation in
the G.975 mode. In this mode, the G.709 overhead processing
can be inhibited and direct access to the non-framing bytes in
the overhead column is provided through the pins on the
device. The device operates in the 255,238 mapping mode
with no stuff columns inserted in the FEC payload.
There is also some limited backwards compatibility with the
S3062 device, AMCC’s first generation 2.5G FEC device. The
details of this backwards compatibility are outlined in the full
Rubicon-48 datasheet.
DVB, Escon, Ficon
DVB, Escon, Ficon
10 Lanes of GE,
10 Lanes of GE,
FC, or 2XFC
FC, or 2XFC
-15
). The Rubicon-48 device
Empowering Intelligent Optical Networks
Volta-48
Volta-48
Figure 2: Multi-Protocol LAN Transport
Rubicon-48
Rubicon-48
CONTROL INTERFACE
A general purpose 16-bit microprocessor interface is provided
for control and monitoring. The interface supports both Intel
and Motorola type microprocessors, and is capable of operat-
ing in either interrupt driven or polled-mode configurations.
APPLICATION DIAGRAMS
Figure 2: Multi-Protocol LAN Transport
Figure 2 shows the Rubicon-48 in an edge transponder appli-
cation. The client side signals are first mapped into virtually
concatenated SONET streams. The Volta-48 supports a vari-
ety of client side signals including GE, FC, 2XFC, DVB, Ficon
and Escon. In addition to the flexible client interface on the
Volta-48, the chip also supports fractional GE interfaces,
allowing a less than full rate GE client to be transported. The
Volta-48 also includes an independent wide range CDR on
each client input, allowing the chip to interface directly to the
client optics module. Once the client payloads have been
mapped into VC SONET streams, an STS48 signal is pre-
sented on the high speed or line side of the Volta-48.
The Rubicon-48 then monitors and wraps it’s client signal into
an ODU-1 payload and appends the GFEC or EFEC code
necessary for transport. The PHY interface is achieved with
the S3485 CMOS transciever.
Part Number S4815PBI, Revision 2.2, May 2006
S3485
S3485
Product Brief
1 x OTU1
1 x OTU1
2.7GHz
2.7GHz
3