P R O D U C T B R I E F
Yahara - S10123, S10124, S10126
For applications in which the Line signal is G.709 compliant or
for OTN 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 Line Interface. This facilitates convergence
of the SONET/SDH (WIS) and OTN functions into a single
network element.
8G FIBRE CHANNEL MAPPING
The YAHARA device(s) support a 8G Fibre Channel (FC) to OTU-
2 mapping mode, where the 8G FC traffic entering the YAHARA
device(s) via the SFI4.2 interface is mapped into a GFP-T signal,
before then being mapped into an OTU-2 signal. In the reverse
direction an OTU-2 signal carrying an 8G FC signal can be OTU-
2 terminated and then demapped from the GFP-T frame before
being presented over the SFI4.2 system interface.
ODU MAPPING
The YAHARA device(s) also supports a SERDES pass-thru mode,
where the 8G Fibre Channel LAN signal is passed through the
YAHARA device(s) and output on the Line interface at a 8.5Gb/s
rate.
ITU compliant system/backplane mapping of 10GbE and 10G/
8G Fibre Channel signals into ODU-2 signals, via GFP and WIS
frames, is supported whereby a stuff column is added to every
G.709 sub-frame resulting in an ODU rate expansion of (239/
237). The chip can be configured to insert the G.709 compliant
stuff-byte value or to insert user data into this column. The
values assigned to the stuff bytes can be defined from a
register set on chip. Coverage of these stuff columns in the BIP
calculation or in the FEC is optional and can be enabled via
software. When the no-coverage option is enabled, the BIP and
parity check values are calculated as if the standard stuff
values were present.
OC-192/STM MAPPING
The YAHARA device(s) support a mode where OC-192/STM64
(10GBase-W) traffic entering via the Client XFI/SFI or SFI4.2
interfaces can be directly mapped into an OTU-2 signal before
being output over the Line Interface at either a serial 9.954Gb/
s rate or a parallel 16x622Mb/s rate.
The YAHARA device(s) also supports a pure SONET SERDES
pass thru-mode, where the OC-192/STM-64 signal is passed
through the YAHARA device(s) and output at either a serial
9.954Gb/s rate or a paralell 16x622Mb/s rate, with jitter
compliance.
A direct map mode is supported for ODU-2 with no stuff
columns to enable mapping with a 239/238 rate expansion.
Start-of-frame signals are provided at the input and output
ports to enable synchronization to the ODU.
LOOPBACK FUNCTIONS
AIS SUPPORT
Near-end and far-end loopbacks are supported for the System/
Backplane interface and for the line/client interfaces. This
enables client/line and device testing and fault isolation. Each
functional block may be bypassed as required to support the
application.
For applications in which the LINE signal is operating in the
SONET/SDH (WIS) mode, the YAHARA device(s) can generate a
SONET/SDH AIS on the Line egress.
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