
Tethys 4192
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Provides line timing of all line and
system side interfaces
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Processes SONET/SDH flexible
concatenation streams of STS-2c,
3c, 4c, …
to 192c
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Supports auto-detection of concat-
enation streams STS-3c/STM-1,
STS-12c/STM-4, STS-48c/STM-16
and STS-192c/STM-64
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Supports STS-1 level pointer pro-
cessing of STS-192/STM-64 or
STS-48/STM-16 streams
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Provides interfaces for dropping
alarm and status information, and
for forcing alarm conditions
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Provides de skew of up to
±
250 ns
for quad STS-192/STM-64
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Power dissipation of 15 W, depend-
ing on mode of operation
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Terminates and generates SONET
section, line, and path layers
P
R E L I M I N A R Y
P
R O D U C T
F
L Y E R
N e v e r s t o p t h i n k i n g .
Te t h y s 4 1 9 2
P E B 1 7 5 7 E
Quad STS-192/STM-64 MUX/DEMUX
Semiconductor Solutions for
High Speed Communications
and Fiber Optic Applications
Tethys 4192 is optimized for SONET/SDH applica-
tions as a full-duplex four STS-192/STM-64
MUX/DEMUX with full framer functionality including
pointer processing, and overhead termination; ideal for
aggregation, ADM and DWDM applications. In the
demultiplex ingress direction, Tethys 4192 accepts
four STS-192/STM-64 signals in SFI-4.2/SFI-4.1 format.
Tethys locates the incoming SONET/SDH frame,
optionally de scrambles the data, monitors the TOH
and POH, and provides STS-1 level pointer processing.
In addition, Tethys supports TOH and POH overhead
transparency.
In the multiplex direction, Tethys 4192 accepts four
STS-192/STM-64 or sixteen STS-48/STM-16 signals in
either 4 x 2.5 Gbit/s or serial 2.5 Gbit/s format. Further
Tethys provides corresponding functionality in the
DEMUX direction.
Applications
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ADM
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Metro Aggregation
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Digital Cross connects
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Repeaters
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DWDM Equipment
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Test Equipment
Features
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Complies with OIF specifications
SFI-4.2, SFI-4.1 or provides serial
STS-48/STM-16 links
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Differential CML 2.5 G I/O interface
to optics
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Differential CML 2.5 G I/O interface
to system/backplane
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TFI-5 Support
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Processes SONET/SDH quad
STS-192/STM-64 on the line side
interface
■
Processes SONET/SDH quad
STS-192/STM-64 or sixteen
STS-48/STM-16 on the system/cli-
■
Provides TOH and POH
■
Provides monitoring of POH bytes
B3 and N1/Z5
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Provides B2 SF/SD capability for
Poisson and bursty error
distribution
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Provides full TOH/POH add/drop
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Provides STS-1 level POH
add/drop
■
Supports more than
±
746 UI
programmable output skew on
STS-192/STM-64 or
STS-48/STM-16 output links to
external cross-connects
■
For diagnostic purposes, Tethys
provides PRBS generator/checker
and loop backs
■
Provides B1, B2, H1 and H2 bit
error generation for both receive
and transmit direction diagnostics
■
Provides 1 second performance
monitors