363-206-295
Circuit Pack Descriptions
7-74
Issue 1
December 1997
Timing Circuitry
7
Each TGS circuit pack sends timing signals to the 23H/23H-U OLIU circuit pack
via the TSI circuit packs.
The 23H/23H-U OLIU circuit pack sends a clock signal to both TGS circuit packs
for loop timing.
Protection Circuitry
7
The 23H/23H-U OLIU provides STS-1 data path selectors for implementing a 1x1
protection switch between TSI circuit packs. The selectors are controlled by the
SYSCTL.
The 23H/23H-U OLIU is protection switched by the SYSCTL in response to fault
indications on the 23H/23H-U OLIU, or in response to fault indications on a
transmission circuit pack with which it interfaces, or in response to external
commands.
Fault Detection Circuitry
7
The 23H/23H-U OLIU circuit pack has in-service and out-of-service built-in test
capability. In-service device testing is continuous, and errors are reported to the
SYSCTL when they occur via the intra-shelf control bus. Incoming and outgoing
optical power thresholds are also monitored.
There is no electrical loopback in the 23H/23H-U OLIU. All loopbacks are external
optical loopbacks which require an attenuator.
Performance Monitoring
7
The 23H/23H-U OLIU provides PM circuitry for the following maintenance
parameters:
■
Parity error counts
■
Incoming OC-12 OOF
■
Outgoing OC-12 laser bias current threshold
■
Line parameters based on B2 coding violations.
Power Circuitry
7
The 23H/23H-U OLIU circuit pack uses board-mounted DC-DC power converters
that convert
−
48 V received from the backplane to +5 V,
−
5.2 V, +15 V, and
−
2.3 V
for use on the circuit pack. The 23H/23H-U OLIU interfaces with both the A and B
feeders and provides a "diode-ORed," so that loss of one feeder will not affect the
23H/23H-U OLIU. A fuse element is provided at the
−
48 V input to the DC-DC
converter.
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 ...