s19204cbi12 Applied Micro Circuits Corporation (AMCC), s19204cbi12 Datasheet - Page 2

• Manufacturer Part Number: s19204cbi12
• Description: Sonet/sdh Sts-192/stm-64 Mux/demux With Pointer Processor
• Manufacturer: Applied Micro Circuits Corporation (AMCC)

MEKONG
SONET/SDH STS-192/STM-64 MUX/DEMUX with Pointer Processor
2
Overview and Applications
SONET Processing
The S19204 can be used in either SONET or SDH applications.
On the low-speed side, it can interface to 4 STS-48/STM-16 or 1
STS-192/STM-64 signal in each direction. On the high-speed
side, it can interface to 1 STS-192/STM-64 signal in each direc-
tion.
In the demultiplex direction, the S19204 accepts a 622 MHz 16-bit
STS-192/STM-64 signal. There are several modes of operation
that the S19204 supports in the demultiplex direction.
The S19204 provides a full bypass mode, as well as a pointer pro-
cessor bypass mode. In the full bypass mode, the S19204 simply
passes the incoming STS-192/STM-64 signal directly through to
the Demux output. Framing, descrambling and TOH monitoring
are performed off-line, in a non-intrusive manner for monitoring
purposes only. No pointer processing, cross connection or frame
generation is performed.
In pointer processor bypass operation, the S19204 locates the
incoming STS-192/STM-64 frame, optionally descrambles the
data, and non-intrusively monitors the TOH. The STS-192/STM-
64 signal is then passed directly to the frame generation block, in
which outgoing TOH overhead bytes can be provisionally regen-
erated, on a per function basis. Again, no pointer processing is
performed, and the cross-connect block is bypassed.
For applications requiring pointer processing, the S19204 locates
frame in the incoming STS-192/STM-64 signal, performs
descrambling, monitors the TOH bytes, and then performs pointer
processing. The pointer processor provides a mode in which the
incoming TOH bytes transparently pass through the pointer pro-
cessor to the corresponding locations in the TOH of the outgoing
tributaries. The TOH bytes involved in this transparent pass-
through mode include the defined overhead bytes for the constitu-
ent STS-48/STM-16 or STS-192/STM-64 signals. A 4xSTS-48/
STM-16 mux, with inputs from the MX and DX LINE and APS
inputs, and a 192x192 cross-connect block is available after the
pointer processor. This MUX/cross-connect block can be used to
select STS-1 from any of the demuxed tributaries, tributaries from
the low-speed mux inputs, or tributaries from the DX and MX APS
interfaces to place into any one of the outgoing STS-1 time slots
in any of the outgoing signals in the demux direction. Whether the
signal contains an STS-192c/AU-4-64c payload or a STS-192/
AU-4-64 payload, the S19204 can demultiplex the signal to 4
STS-48/STM-16 tributaries. The selected tributaries then proceed
in the demux direction to frame generators that provisionally gen-
erate the TOH/SOH bytes, perform scrambling, and output the
data. Alternatively, the overhead data can be transparently
passed through the from the demux input to the demux output(s).
In the multiplex direction, the S19204 accepts a single 16-bit wide
622 MHz STS-192/STM-64 signal or 4 STS-48/STM-16 signals.
There are several modes of operation that the S19204 supports in
the multiplex direction.
For STS-192 only operation, the S19204 provides a full bypass
mode, as well as a pointer processor bypass mode. In the full
bypass mode, the S19204 simply passes the incoming STS-192/
STM-64 signal directly through to the mux output. Framing,
Empowering Intelligent Optical Networks
descrambling and TOH monitoring are performed off-line, in a
non-intrusive manner for monitoring purposes only. No pointer
processing, cross connection or frame generation is performed.
In pointer processor bypass operation, the S19204 locates the
incoming STS-192/STM-64 frame, optionally descrambles the
data, and non-intrusively monitors the TOH. The STS-192/STM-
64 signal is then passed directly to the frame generation block, in
which outgoing TOH overhead bytes can be provisionally regen-
erated, on a per function basis. Again, no pointer processing is
performed, and the cross-connect block is bypassed.
The S19204 also supports an Inverse Multiplexing mode, where
four incoming STS-48/STM-16 signals that are frequency locked
and framed aligned to each other, within 500 nsecs, can be inter-
leaved to create an STS-192/STM-64 signal, and if required,
pointer processed.
For applications requiring pointer processing, the S19204 locates
the incoming STS-192/STM-64 or STS-48/STM-16, frames (from
either the incoming mux tributaries, or via the Deskew Buffers),
descrambles the data, non-intrusively monitors the TOH/SOH
bytes and then performs pointer processing for all valid combina-
tions of STS-192C/AU-4-64c, STS-48c/AU-4-16c, STS-12c/AU-4-
4c, STS-3c/AU-4-4c or STS-1/AU-3 signals. The pointer proces-
sor also provides a mode in which the incoming TOH bytes trans-
parently pass through the pointer processor to the corresponding
locations in the TOH of the outgoing tributaries. The TOH bytes
involved in this transparent pass-through mode include the
defined overhead bytes for the constituent STS-48/STM-16 or
STS-192/STM-64 signals. A 4xSTS-48/STM-16 mux, with inputs
from the MX and DX LINE and APS inputs, and a 192x192 cross-
connect block is available after the pointer processor. This MUX/
cross-connect block can be used to select STS-1 from any of the
incoming mux tributaries, tributaries from the high-speed Pointer
Processor outputs, or tributaries from the DX and MX APS inter-
faces to place into any one of the outgoing STS-1 time slots in the
outgoing STS-192/STM-64 signal in the mux direction. After the
MUX/Cross-Connect block, the STS-192/STM-16 muxed signal
then proceeds to a frame generator that provisionally generates
the TOH/SOH bytes, performs scrambling, and outputs the data.
Alternatively, the overhead data can be transparently passed
through from the mux inputs to output.
Low-Speed Interfaces
On the low-speed side, in both the mux and demux directions, the
S19204 supports either a 16-bit wide, 622 Mb/s STS-192/STM-64
signal, or four 4-bit wide, 622 Mb/s STS-48/STM-16 signals. The
S19204 is designed to bolt directly to AMCC SERDES and Clock
Recovery Unit devices. (See figure below.)
High-Speed Interface
On the high-speed side, in both the mux and demux directions,
the S19204 supports a 16-bit wide, 622 Mb/s STS-192/STM-64
signal.
Controller Interface
A high-speed, synchronous, microprocessor interface is provided
for configuration and monitoring. S19204 provides numerous,
automatic, monitoring functions. It can be configured to provide an
interrupt to the control system, or it can be operated in a polled
mode.
Part Number S19204CBI12, Revision 1.21, June 2003
Product Brief