363-206-295
Circuit Pack Descriptions
7-54
Issue 1
December 1997
Protection Circuitry
7
Optional 1+1 nonrevertive unidirectional line protection switching compliant with
SONET specifications is provided. The 21D/21D-U OLIU is protection switched by
the SYSCTL in response to an external command, incoming signal failure, or
internal equipment fault. The 21D/21D-U OLIU circuit pack is protection switched
with the IS-3 line.
The 21D/21D-U OLIU provides selectors for STS-1 and timing signals from the
TSI circuit packs. The 21D/21D-U OLIU monitors these inputs and selects one as
directed by SYSCTL.
Fault Detection Circuitry
7
The 21D/21D-U OLIU circuit pack has in-service and out-of-service built-in test
capability. An out-of-service test is performed whenever the 21D/21D-U OLIU
resets or is commanded to reset by the SYSCTL through the serial interface.
In-service testing is continuous and errors are reported when they occur to the
SYSCTL via the intra-shelf control bus. An out-of-service test is performed
whenever the 21D/21D-U OLIU circuit pack is inserted or recovers from a
transient failure.
Performance Monitoring
7
The 21D/21D-U OLIU circuit pack provides PM circuitry for the following
performance parameters:
■
Section severely errored frame seconds (SEFS) count
■
Line parameters based on B2 coding violations.
Power Circuitry
7
Power for the 21D/21D-U OLIU circuit pack is provided by a DC-to-DC converter
located on the 21D/21D-U OLIU circuit pack. The converter su5 volts and
−
5.2 volts. Both A and B
−
48 volt backplane busses supply power to the converter
through diode ORed circuit pack-mounted power select circuits and circuit pack-
mounted fuses. A failure of the fuse or converter causes the red FAULT LED to
light.
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 ...