TMXF28155 Supermapper
155/51 Mbits/s SONET/SDH x28/x21 DS1/E1
Data Sheet
June 2002
17 TMUX Functional Description (continued)
■ The pointer interpreter will transition out of the NORM state based on the following conditions:
— Following eight consecutive invalid pointers, the pointer interpreter will transition from the NORM state into
the LOP state.
— If NDF is enabled on the incoming H1 and H2 bytes, the pointer interpreter will transition from the NORM
state into the NDF state.
— Following three consecutive frames with all ones in the H1 and H2 bytes, the pointer interpreter will transition
from the NORM state into the AIS state.
— When operating in the 8 of 10 mode, controlled by TMUX_8ORMAJORITY = 1 (Table 105 on page 97), if 8 of
the 10 I and D bits are correct for a pointer decrement on the incoming H1 and H2 bytes, the pointer inter-
preter will transition 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 will transition
from the NORM state into the DEC state.
— When operating in the 8 of 10 mode (TMUX_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 will transition 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 will transition from the NORM state into the INC
state.The pointer interpreter will transition into the INC state based on the following conditions.
— When operating in the 8 of 10 mode (TMUX_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 will transition 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 will transition into the INC state.
■ The pointer interpreter will transition out of the INC state based on the following conditions:
— If NDF is enabled on the incoming H1 and H2 bytes, the pointer interpreter will transition from the INC state
into the NDF state.
— Following three consecutive frames with all ones in the H1 and H2 bytes, the pointer interpreter will transition
from the INC state into the AIS state.
— Following three new, consecutive, consistent, and valid pointers, the pointer interpreter will transition from the
INC state into the NORM state.
— Following any three consecutive, consistent, and valid pointers, the pointer interpreter will transition from the
INC state into the NORM state.
— Following eight consecutive invalid pointers, the pointer interpreter will transition from the INC state into the
LOP state.
■ The pointer interpreter will transition into the DEC state based on the following conditions:
— When operating in the 8 of 10 mode (TMUX_8ORMAJORITY = 1), 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 will transition 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 will transition into the DEC state.
■ The pointer interpreter will transition out of the DEC state based on the following conditions:
— If NDF is enabled on the incoming H1 and H2 bytes, the pointer interpreter will transition from the DEC state
into the NDF state.
— Following three consecutive frames with all ones in the H1 and H2 bytes, the pointer interpreter will transition
from the DEC state into the AIS state.
— Following three new, consecutive, consistent, and valid pointers, the pointer interpreter will transition from the
DEC state into the NORM state.
— Following any three consecutive, consistent, and valid pointers, the pointer interpreter will transition from the
DEC state into the NORM state.
— Following eight consecutive invalid pointers, the pointer interpreter will transition from the DEC state into the
LOP state.
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Agere Systems Inc.
ETC [ ETC ]
