
Advance Information
MT9072
125
Bit
Name
Functional Description
15-8
PSM7-0
PRBS Multiframe Counter.
This counter is incremented for each received CRC multiframe.
It is cleared when the PRBS Error Counter is written to.
7-0
PS7-0
PRBS Error Counter.
This counter is incremented for each PRBS error detected on any of
the receive channels connected to the PRBS error detector.
Table 84 - PRBS Error Counter and CRC Multiframe Counter for PRBS(Y15) (T1)
Bit
Name
Functional Description
15-0
MFOOF15-0
(1)
Multiframes Out of Synchronization Counter.
This 16 bit counter will be incremented
once for every multiframe (1.5 milliseconds in D4 mode, 3 milliseconds in ESF mode) in
which basic frame synchronization is lost. This counter presets to one upon reset. If
terminal frame synchronization is neverobtained, the mfoof counter will keep
incrementing every 1.5 or 3 msec (ESF Mode)
Table 85 - Multiframe Out of Frame Counter(Y16) (T1)
Bit
Name
Functional Description
15-0
FC15 - 0
Framing Bit Error Counter.
This 16 bit counter will be incremented for each error in the
received framing pattern. In ESF mode the ESF framing bits are monitored. In D4 mode the
counter reflects the combination of Ft and Fs errors. The count is only active if the Framer
is in synchronization.
Table 86 - Framing Bit Error Counter(Y17) (T1)
Bit
Name
Functional Description
15-0
BPV15-0
BPV Counter.
16 bit counter that is incremented for every bipolar violation error received.
Table 87 - Bipolar Violation Counter(Y18) (T1)
Bit
Name
Functional Description
15-0
CC15-0
CRC-6 Error Counter Bits 15 to Zero.
These are the 16 bits of the CRC-6 error counter. This
is only relevant in the ESF Mode. This counter increments for every CRC-6 error.
Table 88 - CRC-6 Error Counter(Y19) (T1)
Bit
Name
Functional Description
15-8
OOF7 - 0
Out Of Frame Counter.
This eight bit counter is incremented with every loss of receive
frame synchronization. Hence if you loss sync, gain sync and loss it again the counter will
have a value of 2.
7-0
COFA7 - 0
Change of Frame Alignment Counter.
This eight bit counter is incremented if a
resynchronization is done which results in a shift in the frame alignment position.
Table 89 - Out of Frame and Change of Frame Counters(Y1A) (T1)