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Preliminary Data Sheet, Rev. 1
October2000
TMXF28155 Super Mapper
155/51 Mbits/s SONET/SDH x28/x21 DS1/E1
205
Lucent Technologies Inc.
SPE Mapper Functional Description
(continued)
PATH Termination Block
(continued)
I
The pointer interpreter transitions into the NDF state based on the following conditions:
— If NDF is enabled on the incoming H1 and H2 bytes, the pointer interpreter transitions from the NORM, NDF,
AIS, INC, and DEC states into the NDF state.
I
The pointer interpreter transitions out of the NDF state based on the following conditions:
— Continuous NDF. If NDF (1001, 0001, 1101, 1011, 1000) is received for the number of consecutive frames
(determined by the value programmed in SPE_CNTDLOPCNT[1:0] (Table 125)), the pointer interpreter tran-
sitions from the NDF state into the LOP-TU3 state.
— Following any three consecutive, consistent, and valid pointers, the pointer interpreter transitions from the NDF
state into the NORM state.
— Following three consecutive frames with all ones in the H1 and H2 bytes, the pointer interpreter transitions
from the NDF state into the AIS-TU3 state.
— Following three new, consecutive, consistent, and valid pointers, the pointer interpreter transitions from the
NDF state into the NORM state.
— Following the number of consecutive invalid pointers (determined by the value programmed in
SPE_CNTDLOPCNT[1:0]), the pointer interpreter transitions from the NDF state into the LOP-TU3 state.
I
The pointer interpreter transitions into the NORM state based on the following conditions:
— Following three new consecutive, consistent, and valid pointers, the pointer interpreter transitions into the
NORM state.
— Following any three consecutive, consistent, and valid pointers, the pointer interpreter transitions into the
NORM state. i.e., transitioning from the INC, DEC, and NDF states.
I
The pointer interpreter transitions out of the NORM state based on the following conditions:
— Following the number of consecutive invalid pointers (determined by the value programmed in
SPE_CNTDLOPCNT[1:0]), the pointer interpreter transitions from the NORM state into the LOP-TU3 state.
— If NDF is enabled on the incoming H1 and H2 bytes, the pointer interpreter transitions from the NORM state
into the NDF state.
— Following three consecutive frames with all ones in the H1 and H2 bytes, the pointer interpreter transitions
from the NORM state into the AIS-TU3 state.
— When operating in the 8 of 10 mode (SPE_8ORMAJORITY = 1 (Table 125)), if 8 of the 10 I and D bits are
correct for a pointer decrement on the incoming H1 and H2 bytes the pointer interpreter transitions from the
NORM state into the DEC state. Otherwise, if 3 of the 5 I bits and 3 of the 5 D bits are correct for a pointer
decrement on the incoming H1 and H2 bytes, the pointer interpreter transitions from the NORM state into the
DEC state.
— When operating in the 8 of 10 mode (SPE_8ORMAJORITY = 1), if 8 of the 10 I and D bits are correct for a
pointer increment on the incoming H1 and H2 bytes, the pointer interpreter transitions from the NORM state
into the INC state. Otherwise, if 3 of the 5 I bits and 3 of the 5 D bits are correct for a pointer increment on the
incoming H1 and H2 bytes, the pointer interpreter transitions from the NORM state into the INC state.
I
The pointer interpreter transitions into the INC state based on the following conditions:
— When operating in the 8 of 10 mode (SPE_8ORMAJORITY = 1), if 8 of the 10 I and D bits are correct for a
pointer increment on the incoming H1 and H2 bytes the pointer interpreter transitions into the INC state. Oth-
erwise, if 3 of the 5 I bits and 3 of the 5 D bits are correct for a pointer increment on the incoming H1 and H2
bytes, the pointer interpreter transitions into the INC state.