Issue 1
December 1997
GL-1
Glossary
0x1
See Ring (0x1) Low Speed Interface.
1+1
The 1+1 protection switching architecture protects against failures of the optical transmit/
receive equipment and their connecting fiber facility. One bidirectional interface (two
fibers plus associated OLIUs on each end) is designated "service," and the other is
designated "protection." In each direction, identical signals are transmitted on the service
and protection lines ("dual-fed"). The receiving equipment monitors the incoming service
and protection lines independently, and selects traffic from one line (the "active" line)
based on performance criteria and technician/OS control. In 1+1 both service and
protection lines could be active at the same time (service in one direction—protection in
the other).
1xN, 1x1
1xN protection switching pertains to circuit pack protection that provides a redundant
signal path through the DDM-2000 (it does not cover protection switching of an optical
facility; see "1+1"). In 1xN switching, a group of N service circuit packs share a single
spare protection circuit pack. 1x1 is a special case of 1xN, with N=1. In 1x1 only one is
active at a time.
A
ABN
Abnormal (status condition)
ACO
Alarm Cutoff — A pushbutton switch available on the user panel that can be used to
retire an audible office alarm.
ACO/TST
Alarm Cutoff and Test — The name of a pushbutton on the user panel.
Active
Active identifies a 1+1 protected OC-N line which is currently selected by the receiver at
either end as the payload carrying signal or a 1x1 or 1xn protected circuit pack that is
currently carrying service. (See Standby.)
ADM
Add/Drop Multiplexer.
AIS
Alarm Indication Signal — A code transmitted downstream in a digital network that
shows that an upstream failure has been detected and alarmed.
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 ...
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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 ...