
TMXF28155 Supermapper
155/51 Mbits/s SONET/SDH x28/x21 DS1/E1
Data Sheet
June 2002
514
Agere Systems Inc.
21 28-Channel Framer Block Functional Description
(continued)
21.20 Performance Report Message
The performance monitor block monitors for errored second events and generates the one-second data for the
extended superframe (ESF) performance report message (PRM) (G.704 Section 2.1.3.1.3.3, G.963, T1.231 Sec-
tion 6.3, and T1.403 Section 9.4.2.). The form of the PRM message is shown in
Table 599
. The definition of the
fields is given in
Table 600
.
The superframer performance monitor block outputs fields G1—G6, FE, SE, LV, SL, and LB. The remaining fields
are generated in the HDLC block.
A severely errored frame (SEF) defect is determined by examining contiguous time windows for frame bit errors. In
ESF, the window size is 3 ms, and only the frame pattern sequence bits are checked. An SEF defect occurs when
two or more frame bit errors in a window are detected. An SEF defect is terminated when the signal is in frame and
there are less than two frame bit errors in a window.
Table 599. Performance Report Message Format
Table 600. Performance Report Message Field Definition
Octet Number
1
2
3
4
5
6
7
8
9
10
11
12
13—14
15
PRM B7
PRM B6
PRM B5
PRM B4
PRM B3
Flag
PRM B2
PRM B1
PRM B0
SAPI
C/R
EA
EA
TEI
Control
G3
FE
G3
FE
G3
FE
G3
FE
LV
SE
LV
SE
LV
SE
LV
SE
G4
LB
G4
LB
G4
LB
G4
LB
U1
G1
U1
G1
U1
G1
U1
G1
U2
R
U2
R
U2
R
U2
R
G5
G2
G5
G2
G5
G2
G5
G2
SL
Nm
SL
Nm
SL
Nm
SL
Nm
G6
NI
G6
NI
G6
NI
G6
NI
FCS
FLAG
Field
G1 = 1
G2 = 1
G3 = 1
G4 = 1
G5 = 1
G6 = 1
SE = 1
FE = 1
LV = 1
SL = 1
LB = 1
U1, U2 = 0
R = 0
Definition
CRC Error Event = 1
1 < CRC Error Event
≤
5
5 < CRC Error Event
≤
10
10 < CRC Error Event
≤
100
100 < CRC Error Event
≤
319
CRC Error Event
≥
320
Severely Errored Framing Event
≥
1 (FE will = 0)
Frame Synchronization Bit Error Event
≥
1 (SE will = 0)
Line Code Violation Event
≥
1 (BPV
≥
1 or EXZ
≥
1)
Slip Event
≥
1
Payload Loopback Activated
Reserved
Reserved (default value = 0)
One Second Report Modulo 4 Counter
Nm, NI = 00, 01, 10, 11