PM5364 pmc-sierra, PM5364 Datasheet - Page 40
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PM5364
Manufacturer Part Number
PM5364
Description
Tupp 2488 Assp Telecom Standard
Manufacturer
pmc-sierra
Datasheet
1.PM5364.pdf
(306 pages)
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Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2011334, Issue 7
The line and system interfaces are configurable independently. Line ingress and line egress
interfaces must be configured with the same type of interface as each other. Similarly, system
ingress and system egress interfaces must be configured with the same type of interface as each
other.
When configured for SONET compatible operation, the TUPP 2488 processes all tributaries in
the forty-eight STS-1 synchronous payload envelopes of an STS-48 or four STS-12 byte serial
streams. Similarly, when configured for SDH compatible operation, the TUPP 2488 processes
all tributaries in the sixteen AU4 or forty-eight AU3 administrative units of an STM-16 or four
STM-4 byte serial streams.
The TUPP 2488 translates pointer justifications in high order payloads (STS-1/STM-0, AU4,
AU3) to pointer justifications in low order payloads (VT6, VT3, VT2, VT1.5, TU3, TU2, TU12,
or TU11), resulting in all VT/TUs being located in fixed columns of the transport frame.
The TUPP 2488 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 2488 monitors VT/TU path bit error rates (BIP-2). Two independent monitors are
provided per tributary, one for an excessive error defect (DEXC) alarm and one for a signal
degrade (SD) alarm. Programmable thresholds allow the monitors to declare an alarm for bit
error rates from 10
alarms to declare a signal fail (SF) condition.
The TUPP 2488 provides useful maintenance functions. They include, for each tributary,
detection of loss of pointer, detection of AIS alarm, detection of tributary path signal label
mismatch and unstable alarms, detection of tributary path trace mismatch and unstable alarms.
Optionally, interrupts can be generated due to the assertion and removal of any of the above
alarm conditions. The TUPP 2488 counts received tributary path BIP-2 (BIP-8 for TU3) errors
on a block or bit basis and counts REI indications. The TUPP 2488 also allows insertion of
tributary path AIS as a consequence of any of the above alarm conditions. In addition, the TUPP
2488 may insert tributary idle (unequipped) into any tributary. Ingress tributary path trace
messages and path signal labels are stored in a set of microprocessor accessible registers. The
TUPP 2488 can also insert inverted new data flag fields that can be used to diagnose
downstream pointer processing elements.
The TUPP 2488 provides a bypass path around the payload processor blocks for non VT-TU
mapped payloads i.e. STS-1, AU3/VC3/C3, AU4/VC4/C4 and contiguous concatenated
payloads STS-3c, STS-12c/AU4-4c, STS-48c/AU4-16c.
The ingress path of TUPP 2488 allows the following SDH payload conversions:
•
•
AU3/VC3/C3 to AU4/VC4/TUG3/TU3/VC3/C3
AU3/VC3/TUG2 to AU4/VC4/TUG3/TUG2
-3
to 10
–12
. The DEXC and SD alarms are optionally aggregated with other
TUPP™ 2488 ASSP Telecom Standard Product Data Sheet
Released
40
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