PM5361TUPP
DATA SHEET
PMC-920526
ISSUE 8
TRIBUTARY UNIT PAYLOAD PROCESSOR
6
DESCRIPTION
The PM5361 TUPP SONET/SDH Tributary Unit Payload Processor is a
monolithic integrated circuit that implements a configurable, multi-channel,
payload processor for alignment of SONET virtual tributaries (VTs) or SDH
tributary units (TUs.)
When configured for SONET compatible operation, the TUPP transfers all
tributaries in the three STS-1 synchronous payload envelopes of an incoming
STS-3 byte serial stream to the three STS-1 synchronous payload envelopes of
an outgoing STS-3 byte serial stream. Similarly, when configured for SDH
compatible operation, the TUPP transfers all tributaries in the single AU4 or three
AU3 administrative units of an incoming STM-1 byte serial stream to a single
AU4 or three AU3 administrative units of an outgoing STM-1 byte serial stream.
The TUPP compensates for pleisiochronous relationships between incoming and
outgoing higher level (STS-1, AU4, AU3) synchronous payload envelope frame
rates through processing of the lower level (VT6, VT3, VT2, VT1.5, TU3, TU2,
TU12, TU11) tributary pointers.
The TUPP is configurable to process any legal mix of tributaries. Each VT group
can be configured to carry any one of the four tributary types (VT1.5, VT2, VT3,
or VT6) and each TUG2 can be configured to carry any one of three tributary
types (TU11, TU12, or TU2). TUG2s can be multiplexed into a VC3 or a TUG3.
Alternatively, each TUG3 can be configured to carry a TU3.
The TUPP operates in conjunction with the PM5323 TSPP Triple SONET/SDH
Payload Processor and the PM5344 SONET/SDH Path Terminating Transceiver
to align tributaries such that they can be switched by the PM5371 TUDX
SONET/SDH Tributary Unit Cross-Connect.
The TUPP provides useful maintenance functions. They include detection of loss
of pointer and pointer re-acquisition for each tributary, and optional generation of
interrupts. The TUPP also allows insertion of tributary path AIS or tributary idle
(unequipped). The TUPP can also insert inverted new data flag fields that can
be used to diagnose downstream pointer processing elements.
No auxiliary high speed clocks are required as the TUPP operates from a single
19.44 MHz line rate clock. The TUPP is configured, controlled and monitored via
a generic 8-bit microprocessor bus interface.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
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PMC [ PMC-SIERRA, INC ]
