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PDF PEB1756E Data sheet ( Hoja de datos )

Número de pieza PEB1756E
Descripción 16 STS-48/STM-16 MUX/DEMUX
Fabricantes Exar Corporation 
Logotipo Exar Corporation Logotipo



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Preliminary
PEB1756E
TETHYS™ 448 16 STS-48/STM-16 MUX/DEMUX
GENERAL DESCRIPTION
Tethys™ 448 is optimized for SONET/SDH applica-
tions as a full-duplex sixteen STS-48/STM-16 or a
mix of sixteen STS-12/STM-4 and STS-3/STM-1
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™ 448 accepts
either sixteen STS-48/ STM-16, or a mix of sixteen
STS-12/STM-4 and STS-3/ STM-1 signals in serial
2.5 Gbit/s or serial 622 Mbit/s or serial 155 Mbit/s for-
mat. Tethys™ 448 locates the incoming SONET/SDH
frame, optionally de-scrambles the data, monitors the
TOH and POH, and provides STS-1 level pointer pro-
cessing. In addition, Tethys™ 448 supports TOH and
POH overhead transparency.
In the multiplex direction, Tethys™ 448 accepts six-
teen STS-48/STM-16 signals in serial 2.5 Gbit/s for-
mat. Tethys™ 448 further provides corresponding
functionality in the DEMUX direction.
APPLICATIONS
• ADM
• Metro Aggregation
• Digital Cross Connects
• Repeaters
• DWDM Equipment
• Test Equipment
FEATURES
• Provides serial STS-48/STM-16, STS-12/STM-4 or
STS-3/STM-1 links
• Differential CML 2.5 Gbit/s I/O interface to optics
• Differential CML 2.5 Gbit/s I/O interface to system/
backplane
• TFI-5 Support
• Processes SONET/SDH sixteen STS-48/STM-16
or a mix of sixteen STM-12/STM-4 and STS-3/
STM-1 on the line side interface
• Processes SONET/SDH sixteen STS-48/STM-16
on the system/client side serial 2.5 Gbit/s interface
• Provides line timing of all line and system side
interfaces
• Processes SONET/SDH flexible concatenation
streams of STS-2c, 3c, 4c, … to 48c
REV. P1.0.0
• Supports auto-detection of concatenation streams
STS-3c/STM-1, STS-12c/STM-4 and STS-48c/
STM-16
• Supports STS-1 level pointer processing of STS-48/
STM-16 or STM-12/STM-4 or STS-3/STM-1
streams
• Provides interfaces for dropping alarm and status
information, and for forcing alarm conditions
• Power dissipation of 15 W, depending on mode of
operation
• Terminates and generates SONET section, line, and
path layers
• Provides TOH and POH transparency
• Provides monitoring of POH bytes B3 and N1/Z5
• Provides B2 SF/SD capability for Poisson and
bursty error distribution
• Provides full TOH/POH add/drop
• Provides STS-1 level POH add/drop
• Supports more than ± 746 UI
• Programmable output skew on STS48/STM-16 out-
put 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
• 0.13 mm process, 1.2 V core, 3.3 V I/O
• Motorola 32-bit synchronous microprocessor inter-
face for configuration, control, and status monitoring
• Complies with GR-253, GR-1377, ITU-T G.707, and
ANSI T1.105
• Provides a standard 5 signal IEEE 1149.1 JTAG test
port for boundary scan board test purposes
SPECIFICATIONS
• OIF TFI-5
STANDARDS
• ANSI T1.105-2000-193R2 (DRAFT)
• ANSI T1.105.05-1994
• T1X1.3/93-005RI -1993 - preliminary
• GR-253-CORE Sept. 2000
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