363-206-295
Maintenance Description
Issue 1
December 1997
9-29
— DS1 (DDM-2000 OC-3 Only) — DS1 near-end path is monitored for
SF framing and both near-end and far-end paths are monitored for
ESF framing. The data is displayed in ES-P, SES-P, and UAS-P
categories. CV-P is also displayed.
— DS3 — DS3 path incoming from the fiber (high-speed side) is
monitored for both P-bits and F&M bits and the data is displayed in
CV-P, ES-P, SES-P, and UAS-P registers. In addition, severely
errored frame seconds (SEFS) are also monitored and displayed.
DS3 path incoming from the DSX-3 (low-speed side) is also
monitored, in addition to monitoring the path from the fiber, for both
P-bits and F&M bits. The same registers are also displayed for the
data from the DSX-3. DS3 path from both the fiber and the DSX-3
are monitored for C-Bits and are displayed in the same registers as
above. The far-end data (FEBE bits) is monitored and displayed as
well.
DS3 Performance Monitoring (PM)
9
DS3 Path PM
9
DDM-2000 OC-12 provides three DS3 path PM options using the BBG11B DS3
circuit pack: P-bit (parity bit), adjusted F&M bit, and C-bit. The options are
selected using a command that also sets the PM mode to "on" (default) or "off",
which enables or disables the monitoring and reporting of DS3 path PM data (see
Table 9-4).
P-Bit
9
When provisioned for P-bit, the system calculates and provides counts of DS3
P-bit coding violations (CV), errored seconds (ES), severely errored seconds
(SES), and unavailable seconds (UAS) incoming from the fiber and DSX. Quarter-
hour and current day registers are provided with provisionable threshold crossing
alerts (TCAs) on a per shelf basis. SEFS are also monitored.
Because P-bits can be corrected at nodes provisioned for violation monitor and
removal (VMR) along a DS3 path, the DS3 P-bit PM data may not provide a
complete report of the end-to-end DS3 path errors.
Adjusted F&M Bit
9
Adjusted F&M bit PM provides an alternative method for determining and
accumulating DS3 path performance data based on an error estimation technique
using errors on the F&M framing bits to approximate the actual error counts in the
DS3 path payload. F&M bits are not corrected at nodes provisioned for VMR
along a DS3 path. When provisioned for adjusted F&M bit, the system calculates
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 ...