363-206-295
Maintenance Description
9-36
Issue 1
December 1997
Severely Errored Seconds (SES)
9
A SES is a second in which 12 or more B2 parity violations are detected or one in
which a LOS, LOF, or line AIS occurs. A UAS is not counted as a SES. SES are
counted and thresholded for the EC-1 line.
Unavailable Seconds (UAS)
9
A UAS is a second during which the EC-1 line is "unavailable." A line is
considered "unavailable" from the beginning of X consecutive SES until the
beginning of Y consecutive seconds, none of which is severely errored. X is equal
to 10 seconds or, in the case of a failure, the line signal failure. Y is equal to 10
seconds of no SES or line signal failure. If there is an unprotected circuit pack
failure, UAS are counted from within 1 second of circuit pack failure to within 1
second of circuit pack recovery. UAS are counted and thresholded for the EC-1
line.
Line Protection Switch Counts
9
Line protection switch counts do not apply to EC-1 interfaces.
STS-1 Path Parameters
9
Performance Monitoring Enabling
9
Collection of STS-1 path parameters is initiated only when a slot is equipped with
a 3DS3 circuit pack. Parameters continue to be available in reports and generate
appropriate TCAs until the 3DS3 circuit pack is removed and the
update
command or the UPD/INIT button is pressed. Path parameters are monitored only
on active circuit packs.
STS-1 Path Coding Violations (B3 Parity)
9
The performance of the STS-1 path is monitored by writing the "B3" byte in the
STS-1 path overhead when the path is originated and checking the "B3" byte for
errors when the path is terminated. The B3 coding violation counter is
incremented for each error detected. Up to eight errors per STS-1 frame can be
detected in each STS-1 synchronous payload envelope (SPE). B3 coding
violations are counted and thresholded separately for each STS-1 path
terminated by the system. CVs are not counted during seconds that contain a line
AIS, LOS, LOF, LOP, STS path AIS, or during a UAS. The B3 parity violations are
counted and thresholded for each STS-1 path terminated by the system.
Содержание DDM-2000 OC-12
Страница 1: ...363 206 295 Issue 1 December 1997 DDM 2000 OC 12 Multiplexer Release 7 0 User Service Manual Volume I ...
Страница 37: ...Tables xxxviii Issue 1 December 1997 A A SONET Overview A 1 SONET Payloads A 18 A 2 SONET Transport Rates A 19 ...
Страница 506: ...INS PROG 8 of 8 Page INS PROG COMMANDS RELATED rtrv eqpt rtrv ne OC 12 DDM 2000 1997 December 1 Issue 11 89 ...
Страница 528: ...RTRV ATTR ALM 2 of 2 Page RTRV ATTR ALM COMMANDS RELATED set attr alm OC 12 DDM 2000 1997 December 1 Issue 11 111 ...
Страница 565: ...RTRV OC3 3 of 3 Page RTRV OC3 COMMANDS RELATED rtrv sync 11 148 1997 December 1 Issue OC 12 DDM 2000 ...
Страница 664: ...SET FEAT 3 of 3 Page SET FEAT COMMANDS RELATED rtrv feat OC 12 DDM 2000 1997 December 1 Issue 11 247 ...
Страница 766: ... Ctl T TOGGLE 2 of 2 Page Ctl T TOGGLE COMMANDS RELATED logout rlgn OC 12 DDM 2000 1997 December 1 Issue 11 349 ...
Страница 847: ...Multiplexer OC 12 DDM 2000 7 Release TARP TOP Manual User Service II Volume 363 206 295 1 Issue 1997 December ...
Страница 867: ...363 206 295 TOP Maintenance and Operation BLANK LEFT INTENTIONALLY PAGE THIS 12 1997 December 1 Issue ...
Страница 1145: ...Order Circuit 363 206 295 NTP 029 1 of 1 Page 1997 December 1 Issue Unused LISTED ORDER IN BELOW ITEMS DO TO GO DETAILS FOR ...
Страница 1146: ...Order Circuit 363 206 295 NTP 030 1 of 1 Page 1997 December 1 Issue Unused LISTED ORDER IN BELOW ITEMS DO TO GO DETAILS FOR ...
Страница 1182: ...Turnup System 363 206 295 NTP 033 1 of 1 Page 1997 December 1 Issue Unused LISTED ORDER IN BELOW ITEMS DO TO GO DETAILS FOR ...
Страница 1243: ...Clearing Trouble 363 206 295 TAP 107 1 of 1 Page 1997 December 1 Issue Unused ...
Страница 1393: ...363 206 295 DLP 513 1 of 1 Page 1997 December 1 Issue Unused ...
Страница 1394: ...363 206 295 DLP 514 1 of 1 Page 1997 December 1 Issue Unused ...
Страница 1456: ...363 206 295 DLP 523 7 of 7 Page 1997 December 1 Issue OC 12 via Access Broadcast Video for Cross connections of Example 4 Figure ...
Страница 1465: ...DLP 525 363 206 295 1997 December 1 Issue 6 of 2 Page Schematic Ring Virtual ATM Sample 1 Figure ...
Страница 1469: ...DLP 525 363 206 295 1997 December 1 Issue 6 of 6 Page Ring Virtual ATM OC 12 DDM 2000 for Cross connections of Example 4 Figure ...
Страница 1565: ...363 206 295 DLP 543 6 of 5 Page 1997 December 1 Issue Network Broadcast Video of Test Transmission 2 Figure ...
Страница 1566: ...DLP 543 363 206 295 1997 December 1 Issue 6 of 6 Page Network Ring Virtual ATM of Test Transmission 3 Figure ...