STANDARD PRODUCT
PM5365 TEMAP
DATASHEET
PMC-1991148
ISSUE 3
HIGH DENSITY VT/TU MAPPER
AND M13 MULTIPLEXER
bit error. Thus, the relationship between BER and BEE count becomes non-
-4
linear above a 10 BER. This must be taken into account when using ESF
CRC-6 counts to determine the BER.
The bit error rate for T1 ESF can be calculated from the one-second PMON
CRCE count by the following equation:
ꢁ
ꢀ
24
8000
24*193
.
.
/
/
ꢁ
log 1ꢂ
BEE
ꢀ
ꢀ
ꢀ
0 /
/
ꢀ
ꢀ
/
/
0
Bit Error Rate = 1 - 10
Figure 21
- CRCE Count vs. BER (T1 ESF mode)
1.00E-02
1.00E-03
1.00E-04
1.00E-05
1.00E-06
1.00E-07
0
50
100
150
200
250
300
350
CRCE
For T1 SF format, the CRCE and FER counts are identical, but the FER counter
is smaller and should be ignored.
Proprietary and Confidential to PMC-Sierra, Inc. and for its Customers’ Internal Use
154
PMC [ PMC-SIERRA, INC ]
