Appendix E – Performance Analysis Options
Acterna ANT-5 Page 139
13. Appendix E – Performance Analysis Options
For an application note on this topic, visit our Web Site, www.acterna.com, or contact
the nearest Regional Sales Office as listed on the back of the manual.
13.1 Analysis and Hierarchy Validity
Analysis PDH SDH SONET Appropriate Anomalies
OFF (none)
G.821
TSE
G.826 (ISM)
B1, B2SUM, HP B3, LP BIP2/8,
E2 FAS, E4 FAS, E3 FAS, E1 FAS,
E1 CRC-4
G.826 (OOS)
TSE
G.828 (ISM)
B1, B2, TSE
G.829 (ISM)
B1, B2, B3, TSE, LP-BIP
M.2100
E4 FAS, E3 FAS, E2 FAS, E1 FAS,
E1 CRC-4, DS3 P-Bit, DS3 FAS, TSE
M.2101
B1, B2SUM, HP B3, LP BIP2/8, TSE
ANSI
TSE, B1, B2, B3, DS3FAS, DS3CPAR
13.2 Summary of performance analysis standards
The quality of digital links is determined with the aid of bit error ratio tests (BERT). The
results of such measurements must be classified in some way, not least because the
quality of a transmission path is often the subject of a contract between the network
provider and the telecommunications user. For this reason, and objective means of
classifying a line as either “good” or “bad” is required. The ITU-T Recommendations
G.821, G.826, G.828, G.829, M.2100 and M.2101 are internationally recognised
standards that specify these parameters.
13.2.1 Recommendation G.821
This Recommendation was originally specified for international circuit-switched
nx64kbit/s connections and expanded to include higher bit rates as time went on. A
hypothetical reference connection is the basis used for determining quality
parameters; this comprises an international long-distance segment, a national
segment and a subscriber access segment.
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