363-206-295
Circuit Pack Descriptions
7-62
Issue 1
December 1997
21G/21G-U/21G2-U OLIU Quick Reference
Summary
7
Transmit Functions
7
The following are the major transmit functions of the 21G/21G-U/21G2-U OLIU
circuit pack:
■
Selects STS-1 inputs from MXRVO, DS3, STS1E, or other OLIU circuit
packs
■
Provides STS-1 signal cross-connections
■
Adds SONET transport overhead
■
Byte-interleaves and scrambles the three selected STS-1 signals to an
STS-3 or STS-3c signal
■
Converts the STS-3 or STS-3c electrical signal to an optical signal and
transmits it over the fiber
■
Monitors laser bias and output power (21G and 21G-U only).
Receive Functions
7
The following are major receive functions of the 21G/21G-U/21G2-U OLIU circuit
pack:
■
Receives an optical OC-3 or OC-3c signal and converts it to an electrical
STS-3 or STS-3c signal
■
Extracts STS-3 clock and retimes the received data
■
Demultiplexes the STS-3 or STS-3c signal into three STS-1 signals
■
Extracts transport overhead
■
Processes the STS-1 or STS-3c pointers and frame-synchronizes the
STS-1 signals
■
Provides STS-1 signal cross-connections
■
Processes the received clock and provides a reference clock to the TGS
circuit packs (OC-3 shelf only).
Control Functions
7
The following are the major control functions of the 21G/21G-U/21G2-U OLIU
circuit pack:
■
Switches protection for the optical line and DS3, MXRVO, STS1E, and TGS
circuit packs on the OC-3 shelf. On the OC-12 shelf, switches protection for
the TSI and TGS circuit packs.
■
Processes transport overhead
■
Stores inventory information (
CLEI code, date of manufacture, etc.).
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 ...