G.828 evaluation can be performed on the following events:
B1
B2
MS-REI
B3
HP-REI
LP-BIP
LP-REI
Bit errors (TSE)
Evaluation of the near end and far-end is possible, however far-end evaluations can only be made if REI is available.
Bit errors can be evaluated for:
Unframed patterns
Framed patterns and bulk signals
Overhead bytes E1/E2 (order wire), F1/F2 (user), D1 - D3 and D4 - D12 (DCC) in the SDH overhead (SOH and POH)
Note:
Bit error evaluation is disabled because G.828 evaluates block errors.
Evaluation According to ITU-T G.829
G.829 is based on the principle of monitoring block errors in service.
ES, SES, BBE and UAS are evaluated.
G.829 evaluation can be performed on the following events:
B1
B2
MS-REI
Bit errors (TSE)
Evaluation of the near end and far-end is possible, however far-end measurement can only be made if REI is available.
Bit errors can be evaluated for:
Unframed patterns
Framed patterns and bulk signals
Overhead bytes E1/E2 (order wire), F1/F2 (user), D1 - D3 and D4 - D12 (DCC) in the SDH Overhead (SOH and POH)
Evaluation According to ITU-T M.2100
Note:
M.2100 is only available in Timed and Auto Mode (see
for setup information).
M.2100 applies to commissioning and maintenance. Commissioning consists of a 15-minute line up phase followed by a 24-hour
in-service measurement. Once the line up phase is completed successfully, errors may occur within certain limits.
ES, SES and UAS are evaluated.
Pass/Fail results are based on threshold values S1 and S2 for ES and SES.
Settings for S1 and S2:
Path allocation: 0.1 to 100%
BISO multiplication factor: 0.1 to 100
The M.2100 evaluation can be performed on the following events:
FAS bit errors (FAS2, FAS34, and FAS140)
CRC-4 errors
EBIT errors
Bit errors (TSE)
Evaluation is made at the “Near End” and at the “Far End” for PCM-30/31 signals with CRC.
RXT-3900 e-Manual D07-00-111P Rev A00
Содержание RXT3900
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