STANDARD PRODUCT
PM5365 TEMAP
DATASHEET
PMC-1991148
ISSUE 3
HIGH DENSITY VT/TU MAPPER
AND M13 MULTIPLEXER
(3) Using the FORCEEN feature in the TRAP Control Registers to manually
force desired values using the RDI (Remote Defect Indication) and RFI
(Auxiliary Remote Defect Indication) bits.
The source of alarm status can be configured on a per-tributary basis. As well,
alarm information from tributaries in any of the three sources of remote alarms
can be mapped to arbitrary tributaries in the outgoing data stream via the Indirect
Remote Alarm Tributary Register and the Indirect Datapath Tributary Register of
the TRAP block.
Two methods of encoding tributary remote alarms are supported: Non-extended
RDI and Extended RDI. This selection is made on a per-tributary basis by
setting the ERDI bits of the TRAP Control registers and the TTOP control
registers. In Non-extended RDI mode, RDI indications are encoded as a one bit
value (RDI, Remote Defect Indication) reflected in the V5 byte of the outgoing
tributrary path overhead. In Extended RDI mode, RDI indications are encoded
as a two bit value (RDI, Remote Defect Indication and RFI, Auxiliary Remote
Defect Indication), and are reflected in both the V5 byte and Z7 byte of the
outgoing tributary path overhead.
Specifically, the outgoing path overhead bits are mapped as follows:
Path
Overhead
bits
Non-extended RDI
(ERDI=0)
Extended RDI
(ERDI=1)
V5 bit 3
V5 bit 8
Z7 bit 5
Z7 bit 6
Z7 bit 7
REI
RDI
0
REI
RDI
RDI
0
RFI
0
NOT(RFI)
In all cases, the RDI-V state will be sent for a minimum of 10 multiframes before
changing, unless a higher priority alarm is required.
9.22 Transmit Tributary Mapper (TTMP)
The Transmit Tributary Mapper block bit asynchronously maps up to 28 T1 or 21
E1 streams into an STS-1 SPE, TUG3 in a STM-1/VC4 or STM-1/VC3 payload.
The TTMP compensates for any frequency differences between the incoming
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94
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