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IDT82P2281
SINGLE T1/E1/J1 LONG HAUL / SHORT HAUL TRANSCEIVER
Functional Description
36
October 7, 2003
3.9
PERFORMANCE MONITOR
3.9.1
T1/J1 MODE
Several internal counters are used to count different events for per-
formance monitoring. For different framing format, the counters are used
differently. The overflow of each counter is reflected by an Overflow Indi-
cation Bit, and can trigger an interrupt if the corresponding Overflow
Interrupt Enable Bit is set. This is shown in Table 22.
These internal counters are indirect registers, and can only be
accessed through other direct registers. At one time, only one internal
counter can be accessed. Users should use the ADDR[3:0] bits to select
one internal counter. The content of the selected counter is transferred
to the DATA[7:0] bits in the following two ways:
1. Auto-Report: When the AUTOUP bit is ‘1’, the selected counter
transfers its content to the DATA[7:0] bits every one second automati-
cally;
2. Manual-Report: No matter the AUTOUPD bit is ‘1’ or ‘0’, at any
time, when there is a transition from ‘0’ to ‘1’ on the UPDAT bit, the
selected counter will transfer its content to the DATA[7:0] bits.
After the content in the selected counter is transferred to the
DATA[7:0] bits, all counters belong to the selected Link will be cleared to
‘0’ as a group and start a new round counting automatically. No error
event is lost during updating.
Table 22: Monitored Events In T1/J1 Mode
Format
Event
Counter
Overflow Interrupt Indication Bit Overflow Interrupt Enable Bit
SF
Bipolar Violation (BPV) Error (in AMI decoding) or B8ZS Code
Violation (CV) Error (in B8ZS decoding)
F Bit Error
The new-found F bit position differs from the previous one
Out of SF synchronization
PRGD Bit Error
Bipolar Violation (BPV) Error (in AMI decoding) or B8ZS Code
Violation (CV) Error (in B8ZS decoding)
Frame Alignment Bit Error
CRC-6 Error
The new-found F bit position differs from the previous one
Out of ESF synchronization
PRGD Bit Error
Bipolar Violation (BPV) Error (in AMI decoding) or B8ZS Code
Violation (CV) Error (in B8ZS decoding)
F Bit Error
DDS Pattern Error
The new-found F bit position differs from the previous one
Out of T1 DM synchronization
PRGD Bit Error
Bipolar Violation (BPV) Error (in AMI decoding) or B8ZS Code
Violation (CV) Error (in B8ZS decoding)
F Bit Error
The new-found F bit position differs from the previous one
Out of SLC-96 synchronization
PRGD Bit Error
LCV[15:0]
LCVOVI
LCVOVE
FER[11:0]
COFA[2:0]
OOF[4:0]
PRGD[15:0]
LCV[15:0]
FEROVI
COFAOVI
OOFOVI
PRGDOVI
LCVOVI
FEROVE
COFAOVE
OOFOVE
PRGDOVE
LCVOVE
ESF
FER[11:0]
CRCE[9:0]
COFA[2:0]
OOF[4:0]
PRGD[15:0]
LCV[15:0]
FEROVI
CRCOVI
COFAOVI
OOFOVI
PRGDOVI
LCVOVI
FEROVE
CRCOVE
COFAOVE
OOFOVE
PRGDOVE
LCVOVE
T1 DM
(T1 only)
FER[11:0]
DDSE[9:0]
COFA[2:0]
OOF[4:0]
PRGD[15:0]
LCV[15:0]
FEROVI
DDSOVI
COFAOVI
OOFOVI
PRGDOVI
LCVOVI
FEROVE
DDSOVE
COFAOVE
OOFOVE
PRGDOVE
LCVOVE
SLC-96
(T1 only)
FER[11:0]
COFA[2:0]
OOF[4:0]
PRGD[15:0]
FEROVI
COFAOVI
OOFOVI
PRGDOVI
FEROVE
COFAOVE
OOFOVE
PRGDOVE