363-206-295
Circuit Pack Descriptions
7-56
Issue 1
December 1997
21G/21G-U/21G2-U OLIU Circuit Pack Description
7
Purpose of Circuit
7
The 21G/21G-U/21G2-U OLIU circuit pack performs the optical/electrical conversion
between the OC-3 and STS-3 signals, multiplexing/demultiplexing between STS-3 and
three STS-1 signals and SONET transport overhead access. The 21G/21G-U/21G2-U
can be used in either the main or function unit slots in an OC-3 shelf, or the function unit
slots only in an OC-12. In the OC-3 shelf, the 21G/21G-U/21G2-U OLIU circuit pack
also provides routing of the STS-1s between the OC-3 interface and other main and
function unit slots in the shelf and will support the STS-1 add/drop feature. In the OC-12
shelf, the routing function is performed in the TSI circuit pack.
21G/21G-U/21G2-U OLIU Faceplate Indicators
7
The 21G2-U OLIU is the same as the 21G/21G-U OLIUs but has improved receiver
overload sensitivity, eliminating the need for a Hi/Low power switch for loopback testing.
The 21G2-U can be used in place of the 21G/21G-U in all applications.
The 21G/21G-U/21G2-U OLIU circuit pack faceplate indicators are shown in
Figure 7-23. The red FAULT LED lights on detection of circuit pack hardware failure. In
the event of an incoming signal failure, this LED will flash ON and OFF. The green
ACTIVE LED lights when the circuit pack is active (carrying service).
Figure 7-23. 21G and 21G-U/21G2-U OLIU Circuit Packs
FAULT
A TIV
C
E
Lucent
S1:1
21G
OLIU
x
x
x
x
x
FAULT
A TIV
C
E
Lucent
S1:1
OLIU
x
x
x
x
x
Lucent
Lucent
IN
OUT
21G-U
Universal
Optical
Connectors
IN
OUT
R
ST Connectors
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 ...