Product Brief
OC-48/12/3 DW/FEC/PM and ASYNC Mapper Device with Strong FEC
Part Number S4815PBI, Revision 2.2, May 2006
Industry Standard RS(255,239) Forward Error Correction with
6.2 dB Coding Gain (at 10-15 CER)
Easy software migration from industry leading AMCC
• G.709 Compliant Frame Structure.
• Compatible with AMCC’s S19203 (HUDSON) and S19208
• Significant reuse of the Niagara register map in Rubicon.
• Superb migration path to lower power Rubicon-48 device.
• Limited backwards compatibility with AMCC’s S3062.
Backwards compatible with AMCC’s industry leading
S3062 FEC device
Enhanced Gain Forward Error Correction with G.709 ODU
• 2.7 Gbps enhanced FEC with > 8.6 dB coding gain.
• FEC and Framing compatible between Rubicon-48 and S3062.
• G.709 overhead processing and nominal rate expansion.
• Superb migration path to better integration Rubicon-48 device.
• Comprehensive channel statistics gathering including.
G.709 ODU - 1 Synchronous and Asynchronous mapping
• Corrected bits, bytes.
• 1 x OC – 48/STM-16 synchronous and asynchronous mapping
• Corrected zeros, ones (with outputs).
G.709 Overhead processing
• Uncorrectable sub-frame count.
• Bi-directional add-drop ODU – 1.
Broad Interface Compatibility
• Bi-direction G.709 Overhead Processing for bi-directional
OTU1 regeneration.
• 16-bit 155Mbps LVDS interface
• 4-bit 622Mbps LVDS interface
• Dedicated GCC ports.
• Compatible with AMCC’s DANUBE, MISSOURI, OHIO,
RHINE, VOLTA, S3465, S3457, S3455, S3086 and S3485.
Ingress and Egress SONET/SDH Performance Monitoring/
• 1 x OC-/48/12/3 TOH add-drop and processing.
• Provides port swapping and output dual feed features for 1 + 1
line protection scheme.
• 8B/10B Monitoring.
Support For System Test and Diagnostics
• SONET/SDH section and line termination including full B2
• Can synthesize SONET frames.
• Error injection capability for verification of remote error reporting.
• TOH add-drop port.
• LOS, OOF, LOF detection.
• Test-set compliant pseudo-random sequence generation/analysis.
• B1, B2 monitoring with programmable Signal Degrade and Signal Fail thresholds.
• Client and Line side loopback.
• J0 Monitoring, SDH and SONET modes.
General Purpose Processor Interface
• Support for Protection Switching.
• Glueless 16-bit interface to MPC860, 25 MHz to 66 MHz. Dual
mode interface also supports Intel processors.
• K1, K2 monitoring for APS changes, line AIS and line RDI.
• Interrupt driven or Polled mode operation.
• Automatic, interrupt-driven, or manual AIS insertion.
• Frame boundary output.
Figure 1: Block Diagram
S F I-4 ( 2 .7
G bps)
E rr In s E n c o d e r
R e g i s t e Irn t e r r u p t
M a p C o n tro l
In g r e s s E g r e s s
S O N E T /S D H
T O H A d d /D r o p
C lie n t o r O T N
In te r fa c e
OC-48/STM-16 or 1 x OTU1 or 1 x ODU1
OC48/STM-16 or 1 x OTU1 or 1 x ODU1
P a tte rn
& E rr
D ecoder
A n a ly s is
ODU-1 Demap
I n g r e s s /E g r e s s
O D U -1 O H
A d d /D r o p
ODU-1 Map
O T N N e tw o r k /L in e
In te r fa c e
R -S
PN gen
E rr In s
E ncoder
R -S
P a tte rn
& E rr
D e c o d e rA n a l y s i s
1 6o r 1 6
u P I/F
FINAL Information - The information contained in this document is
about a product that has been fully tested, characterized, and is production release. All features described herein are supported. Contact
AMCC for updates to this document and the latest product status.
Empowering Intelligent Optical Networks
S F I- 4
(2 .7 G b p s )
Product Brief
OC-48/12/3 DW/FEC/PM and ASYNC Mapper Device with Strong FEC
Additional Protocol Support
Part Number S4815PBI, Revision 2.2, May 2006
are then optionally added to form the OTU-1. The device can also
output the ODU-1 with no parity check bytes. In the receive direction, data is de-mapped from the OTU-1 and control signals are
provided to enable timing regeneration of the client 2.5 Gbps signal.
• FEC Frame Synchronous scrambling.
• Programmable sequence detection.
Pin Compatibility to Niagara device
Low Power.13 u CMOS Technology
• SONET/SDH OC-48/STM-16 DWDM transport systems and
DWDM metro networks.
When operating in the ITU G.709 OTU-1 or ODU-1 mode, the
SONET monitors are bypassed. On-chip processing of the G.709
overhead is provided to enable single chip G.709 section termination. G.709 Overhead can be added or dropped as required. Remapping required for synchronization of asynchronous ODU-1 signals is not supported.
• Transparent Add-Drop Multiplexing Transponder applications.
Client-signal monitoring for 8B/10B encoded data is also provided.
• 1.2 Volt core operation.
• 2.5 Volt I/O.
• Protocol Transparent Transport.
• IaDI to IrDI FEC transponder chip (6.2 dB gain network to > 8.6 dB
gain network).
The AMCC Rubicon-48 device is a wide-area and metropolitan
transport device aimed at next generation applications, required
transparent mapping, and enhanced error correction capability.
The device utilizes the ITU G.709 frame and overhead structures
to enable deployment of full OTN compliant network elements.
Rubicon-48 will support two gain rates, the standard G.975 based
rate of 6.2 dB (raw optical coding gain), and AMCC’s proprietary
EFEC code, rated at greater than 8.6 dB (raw optical coding gain).
The Rubicon-48 device is capable of running both these gains
simultaneously, providing a superb single chip transponder solution for standard gain to enhanced gain networks. Note that the
Rubicon-48 will employ the same industry leading EFEC code that
was used in the AMCC Niagara device, making these devices
totally compatible. The Rubicon-48 is targeted at 2.5G transport
and will also support the framing and FEC code previously
deployed in AMCC’s industry leading S3062 FEC device, allowing
for in-circuit upgrades of older systems.
Both the client and network interfaces support two interface
modes, a 16-bit LVDS interface and a 4-bit LVDS interface. Data is
transferred as either 16-bit LVDS parallel data or 4-bit LVDS parallel data with a synchronous clock. The defined low end of the parallel client/network interface is 31.25 Mbps (across 4 bits of the
interface) for an aggregate bandwidth of 125 Mbps.
A SONET/SDH performance monitor supporting OC-48/12/3 and
SDH-16/4/1 rates is provided to perform optional-section and limited-line termination functions. TOH for the SONET signal is
dropped and added. On chip processing of the critical TOH functions, such as B1, B2, J0, is provided to enable functioning as a
SONET/SDH network element. The performance monitor may
also be configured to provide non-intrusive monitoring while transparently passing through the received signal with no overwrite.
The 2.5 Gbps client signal may be synchronously or asynchronously mapped into the ODU-1 payload. FEC parity check bytes
For applications in which the client signal is SONET or SDH, the
Rubicon-48 can generate a SONET/SDH AIS on both the client
ingress and the egress.
For applications in which the client signal is G.709 compliant or for
OTN regenerator applications, Line Fail and un-equipped OTN
AIS is supported. For OTN edge applications, the device can be
provisioned to provide either a SONET/SDH AIS or a OTN
Generic AIS to the client. This facilitates convergence of the
SONET/SDH and OTN functions into a single network element.
ITU compliant client mapping of SONET OC-48 or SDH STM-16
into the ODU-1 signal is supported whereby a G.709 overhead
byte is added to every G.709 sub-frame resulting in an ODU rate
expansion of (239/238). The chip can be configured to insert the
G.709 compliant overhead byte value or to insert user data into
this location. The values assigned to the stuff bytes can be defined
either from a register set on chip or from an external add-drop port.
Start-of-frame signals are provided at the input and output ports to
enable synchronization to the ODU.
Near-end and far-end loopback is supported for each of the client
interfaces and for the line interface. This enables line and device
testing and fault isolation. Each functional block may be bypassed
as required to support the application. When all blocks are
bypassed, the device allows transparent pass-through of client
data (assuming synchronous inputs).
Key status and alarm signals are provided to outside pins to
enable rapid response to failure conditions. These include but are
not limited to: LOS, OOF, LOF, B1 Errors, and FEC errors. Three
interrupt pins, each with a mask register are provided to enable
prioritization of interrupts and timely interaction with firmware.
In addition to the loopback capabilities of the device, the Rubicon48 also employs a unique port swapping capability allowing the
physical ports on the device to be interfaced to either side of the
FEC encoders. This capability increases the flexibility of a single
board design used in a variety of modes.
Empowering Intelligent Optical Networks
Product Brief
OC-48/12/3 DW/FEC/PM and ASYNC Mapper Device with Strong FEC
Part Number S4815PBI, Revision 2.2, May 2006
Two FEC options are supported on the line side. The Rubicon48 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 10-15). The Rubicon-48 device
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 characteristics.
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 operating in either interrupt driven or polled-mode configurations.
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.
Figure 2: Multi-Protocol LAN Transport
Figure 2 shows the Rubicon-48 in an edge transponder application. The client side signals are first mapped into virtually
concatenated SONET streams. The Volta-48 supports a variety 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 presented 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.
Figure 2: Multi-Protocol LAN Transport
10 Lanes of GE,
DVB, Escon, Ficon
FC, or 2XFC
1 x OTU1
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