P R O D U C T B R I E F
Yahara - S10123, S10124, S10126
G.709 Overhead Processing
The second and third mapping methods are similar and involve
GFP-F encapsulation directly into a standard rate 10.7GHz
OTU-2 frame. The two methods employ different manners of
system/backplane flow control to limit the system/backplane
data rate so that correct encapsulation into the OTU-2 frame
can take place. The first method of flow control is called “pre-
emptive” flow control. In this mode the YAHARA device(s)
assert flow control signals back to the system/backplane in
regular intervals, thereby guaranteeing that the system/
backplane does not overflow the capacity of the OTU-2 frame.
The second method allows for the user to place a FIFO-fill line
on the ingress system/backplane fifo inside the YAHARA
device(s). When the FIFO-fill line is crossed the YAHARA
device(s) assert flow control signals back to the system/
backplane in order to bleed off the ingress system/backplane
FIFO.
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Insert/Drop Port for access to all of ODU-2 overhead
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Dedicated GCC ports
Ingress and Egress Client/Line Data Performance Monitoring
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1 x OC192C TOH Add/Drop and processing
8B/10B PCS monitoring
10GbE L1/L2 Monitoring (PCS and MAC)
SONET/SDH Section/Line Overhead Monitoring per GR-253
and IEEE802.3ae WIS standards
Industry Standard RS(255,239) Forward Error Correction with
6.2 dB Coding Gain (at 10-15 CER)
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G.709 Compliant Frame Structure
Enhanced Gain Forward Error Correction with G.709 ODU
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10.71Gbps, 10.66Gbps, 11.1Gbps, and 11.27Gbps rates with
enhanced FEC with >8dB coding gain
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G.709 overhead processing and nominal rate expansion
Comprehensive channel statistics gathering
Corrected bits, bytes
The fourth manner of 10E-LAN mapping also involves GFP
mapping, and in addition, utilizes some of the OPU overhead
bytes to enable full 10GbE preamble transparency and yield a
G.709/OTU-2 compliant 10.7Gb/s signal. No back-pressure/
flow control mechanism is required to rate limit the system/
backplane in this mode of operation.
Corrected zeros, ones (with outputs)
Uncorrectable sub-frame count
System/Backplane and Line / Client side loopback
System/Backplane side, Line side and Client side loopbacks
Support For System Test and Diagnostics
The fifth manner in which 10GE-LAN mapping is supported is
the WIS mode. In this mode, 10GE-LAN traffic is directly
encapsulated into a WIS frame and output at a 9.953 Gb/s rate.
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Can synthesize WIS (SONET/SDH) frame
Additionaly, in a similar sixth mode, the WIS frame can further
be encapsulated into an OTU-2 frame and output at a G.709
compliant 10.7Gb/s signal.
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Error injection capability for verification of remote error
reporting
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Test-set compliant pseudo-random sequence generation/
analysis
Finally the YAHARA device(s) also supports a pure LAN SERDES
mode, where the 10GbE LAN signal is passed through the
YAHARA device(s) and output on the Line interface at a
10.3Gb/s rate.
General Purpose Processor Interface
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Glueless 16-bit interface to MPC860, 25 MHz to 66 MHz
Dual mode interface also supports Intel processors
Interrupt driven or Polled mode operation
10G FIBRE CHANNEL MAPPING
Additional Protocol Support
The YAHARA device(s) support a 10G Fibre Channel (FC) to
OTU-2 mapping mode, where the 10G FC traffic entering the
YAHARA device(s) via the SFI4.2 interface is mapped directly
into an OTU-2 signal before being presented over the Line
interface at a 11.32/11.27 Gb/s rate, pending the use/non-use
of stuff byte columns. In the reverse direction an OTU-2 signal
carrying a 10G FC signal can be OTU- 2 terminated and then
directly presented over the SFI4.2 system interface.
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FEC Frame Synchronous scrambling
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Programmable sequence detection
Optical Module Control
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Two-wire serial interface compliant to the XFP/SFP+ specifi-
cation
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Dedicated optical module control signals for XFP/SFP+ con-
trol
The YAHARA device(s) also support a PCS PHY mode. In this
mode the 10G FC traffic entering/exiting the XAUI interface can
be 64B/66B encoded/decoded and then mapped/demapped
into an OTU-2 signal before being transmitted/received off of
the 10G Line interface.
10GE-LAN MAPPING
The YAHARA device(s) support 7 distinct methods to map
10GE-LAN into either OTU-2 or WIS (OC-192/STM-64) signals
for transport. Several of the mapping modes are similar to
modes implemented in Rubicon and Pemaquid.
The YAHARA device(s) also supports a SERDES pass-thru mode,
where the 10G Fibre Channel LAN signal is passed through the
YAHARA device(s) and output on the Line interface at a
10.51Gb/s rate.
The first mode is the Bit Transparency Mode. In this mode, the
Line rate operates at 7% above the PCS Encoded Rate.
Specifically, the XAUI (Ethernet) data is transparently mapped
into an OTU-2 frame and output at either 11.096 or 11.049Gbs,
depending if fix stuff bytes are provisioned or not.
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