STANDARD PRODUCT
PM5365 TEMAP
DATASHEET
PMC-1991148
ISSUE 3
HIGH DENSITY VT/TU MAPPER
AND M13 MULTIPLEXER
application. Transmit timing is from an external reference or from the receive
direction clock.
The TEMAP also supports diagnostic options which allow it to insert a Pseudo
Random Binary Sequence (PRBS) into a DS3 payload and checked in the
receive DS3 payload for bit errors. A fixed 100100… pattern is available for
insertion directly into the B3ZS encoder for proper pulse mask shape verification.
When configured in DS3 multiplexer mode, seven 6312 kbit/s data streams are
demultiplexed and multiplexed into and out of the DS3 signal. Bit stuffing and
rate adaptation is performed. The C-bits are set appropriately, with the option of
inserting DS2 loopback requests. Interrupts can be generated upon detection of
loopback requests in the received DS3. AIS may be inserted in the any of the
6312 kbit/s tributaries in both the multiplex and demultiplex directions. C-bit
parity is supported by generating a 6.3062723 MHz clock, which corresponds to
a stuffing ratio of 100%.
Framing to the demultiplexed 6312 kbit/s data streams supports DS2 (ANSI
TI.107) frame formats. The maximum average reframe time is 7ms for DS2. Far
end receive failure is detected and M-bit and F-bit errors are accumulated. The
DS2 framer is an off-line framer, indicating both OOF and COFA events. Error
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 may be independently configured to
multiplex and demultiplex four 1544 kbit/s DS1s 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 framer the unchannelized payload of the DS3 link is
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
Proprietary and Confidential to PMC-Sierra, Inc. and for its Customers’ Internal Use
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PMC [ PMC-SIERRA, INC ]
