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PRELIMINARY
DS3 UNI FOR ATM
XRT7245
REV. 1.03
91
Bit 1—Errored Second
This “Read-Only” bit-field indicates whether or not
there were any errors during the last one second in-
terval. If this bit-field is “0” then there were no errors
during the last one second interval. If this bit-field is
“1”, then there was at least one error during the last
one second interval.
Bit 0—Severe Errored Second
This “Read-Only” bit-field indicates whether or not
the bit-error rate, of the last one second interval, ex-
hibited a BER (bit error rate) exceeding 10
-3
.
A “0” in this bit-field indicates that the BER for the last
one-second interval was less than 10
-3
.
Conversely, a “1” in this bit-field indicates that the
BER for the last one-second interval exceeds 10
-3
.
3.3.2.62
LCV—One Second Accumulator Register—MSB
This register, along with “LCV—One Second Accu-
mulator Register—LSB” (Address = 3Fh) presents a
16-bit representation of the number of Line Code Vio-
lations that have been detected by the Receive DS3
Framer, during the last one second interval. This reg-
ister presents the MSB (Upper-byte) value of this ex-
pression.
3.3.2.63
LCV—One Second Accumulator Register—LSB
This register, along with “LCV—One Second Accu-
mulator Register—LSB” (Address = 3Eh) presents a
16-bit representation of the number of Line Code Vio-
lations that have been detected by the Receive DS3
Framer, during the last one second interval. This reg-
ister presents the LSB (Lower-byte) value of this ex-
pression.
3.3.2.64
Frame Parity Error—One Second Accumulator Register—MSB
This register, along with “Frame Parity Errors—One
Second Accumulator Register—LSB” (Address = 41h)
presents a 16-bit representation of the number of P-
bit errors that have been detected by the Receive
DS3 Framer, during the last one second interval. This
register presents the MSB (Upper-byte) value of this
expression.
Address = 3Eh, LCV—One Second Accumulator Register—MSB
B
IT
7
B
IT
6
B
IT
5
B
IT
4
B
IT
3
B
IT
2
B
IT
1
B
IT
0
LCV 1 Sec—High Byte
RO
RO
RO
RO
RO
RO
RO
RO
0
0
0
0
0
0
0
0
Address = 3Fh, LCV—One Second Accumulator Register—LSB
B
IT
7
B
IT
6
B
IT
5
B
IT
4
B
IT
3
B
IT
2
B
IT
1
B
IT
0
LCV 1 Sec—Low Byte
RO
RO
RO
RO
RO
RO
RO
RO
0
0
0
0
0
0
0
0
Address = 40h, Frame Parity Errors—One Second Accumulator Register—MSB
B
IT
7
B
IT
6
B
IT
5
B
IT
4
B
IT
3
B
IT
2
B
IT
1
B
IT
0
Framer Parity Error 1 Sec—High Byte
RO
RO
RO
RO
RO
RO
RO
RO
0
0
0
0
0
0
0
0