PM5366-PI PMC-Sierra, Inc., PM5366-PI Datasheet - Page 38
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PM5366-PI
Manufacturer Part Number
PM5366-PI
Description
HIGH DENSITY 84/63 CHANNEL VT/TU MAPPER AND M13 MULTIPLEXER
Manufacturer
PMC-Sierra, Inc.
Datasheet
1.PM5366-PI.pdf
(267 pages)
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PRELIMINARY
DATASHEET
PMC-2010672
PROPRIETARY AND CONFIDENTIAL
events (FERF, MERR, FERR, PERR, RAI, framing word errors) are still indicated
while the DS2 framer is indicating OOF, based on the previous alignment.
Each of the seven 6312 kbit/s multiplexers per DS3 may be independently
configured to multiplex and demultiplex four 1544 kbit/s DS1s or three
2048 kbit/s according to ITU-T Rec. G.747 into and out of a DS2 formatted
signal. Tributary frequency deviations are accommodated using internal FIFOs
and bit stuffing. The C-bits are set appropriately, with the option of inserting DS1
loopback requests. Interrupts can be generated upon detection of loopback
requests in the received DS2. AIS may be inserted in any of the low speed
tributaries in both multiplex and demultiplex directions.
When configured as a DS3 or E3 framer the unchannelized payload of the DS3
and E3 links are available to an external device.
The SONET/SDH line side interface provides STS-1 SPE synchronous payload
envelope processing and generation, TUG3 tributary unit group processing and
generation within a VC4 virtual container and VC3 virtual container processing
and generation. The payload processor aligns and monitors the performance of
SONET virtual tributaries (VTs) or SDH tributary units (TUs). Maintenance
functions per tributary include detection of loss of pointer, AIS alarm, tributary
path signal label mismatch and tributary path signal label unstable alarms.
Optionally interrupts can be generated due to the assertion and removal of any
of the above alarms. Counts are accumulated for tributary path BIP-2 errors on a
block or bit basis and for FEBE indications. The synchronous payload envelope
generator generates all tributary pointers and calculates and inserts tributary
path BIP-2. The generator also inserts FEBE, RDI and enhanced RDI in the V5
byte. Software can force AIS insertion on a per tributary basis.
A SONET/SDH mapper maps and demaps up to 84 T1s, 63 E1s or three DS3s
into three STS-1 SPEs, TUG3s or VC3s through three elastic stores. The fixed
stuff (R) bits are all set to zeros or ones under microprocessor control. The bit
asynchronous demapper performs majority vote C-bit decoding to detect stuff
requests for T1, E1 and DS3 asynchronous mappings. The VT1.5/VT2/TU-
11/TU-12 mapper uses an elastic store and a jitter attenuator capability to
minimize jitter introduced via bit stuffing.
The TEMAP-84 is configured, controlled and monitored via a generic 8-bit
microprocessor bus through which all internal registers are accessed. All
sources of interrupts can be masked and acknowledged through the
microprocessor interface.
ISSUE 1
26
HIGH DENSITY 84/63 CHANNEL VT/TU MAPPER
AND M13 MULTIPLEXER
PM5366 TEMAP-84
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