363-206-295
Glossary
GL-16
Issue 1
December 1997
Plesiochronous Network
A network that contains multiple maintenance subnetworks, each internally synchronous
and all operating at the same nominal frequency, but whose timing may be slightly
different at any particular instant. For example in SONET networks, each timing traceable
to their own Stratum 1 clock are considered plesiochronous with respect to each other.
PLL
Phased-Locked Loop
PM
Performance Monitoring — Measures the quality of service and identifies degrading or
marginally operating systems (before an alarm would be generated).
PMN
Power Minor Alarm
POH
Path Overhead
POP
Points of Presence
Port
The physical, electrical, or optical interface on a system. For example, DS1, DS3, EC-1,
OC-3, and OC-12. See Channel.
Port State Provisioning
A feature that allows a user to suppress alarm reporting and performance monitoring
during provisioning by supporting multiple states (automatic, in-service and not
monitored) for low speed ports. See Channel State Provisioning.
POTS
Plain Old Telephone Service
Proactive Maintenance
Refers to the process of detecting degrading conditions not severe enough to initiate
protection switching or alarming, but indicative of an impending signal fail or signal
degrade defect (for example, performance monitoring).
Protection Line
As defined by the SONET standard, the protection line is the pair of fibers (one transmit
and one receive) that carry the SONET APS channel (K1 and K2 bytes in the SONET line
overhead). On a DDM-2000 OC-3 system, a
protection line is a pair of fibers that
terminate on an OLIU circuit pack in the
main-2
,
fn-a-2
,
fn-b-2
, or
fn-c-2
slot. (See
"Service Line.")
PRM
Performance Report Message
PROTN
Protection
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 ...