363-206-295
Circuit Pack Descriptions
Issue 1
December 1997
7-55
21D/21D-U OLIU Quick Reference Summary
7
Transmit Functions
7
Major transmit functions of the 21D/21D-U OLIU circuit pack are as follows:
■
Selects STS-1 inputs from TSI circuit packs
■
Adds SONET transport overhead
■
Byte-interleaves and scrambles the three selected STS-1 or optional
STS-3c signals to produce an STS-3 or STS-3c signal
■
Converts the STS-3 or STS-3c signal to an IS-3 or IS-3c optical signal for
transmission over the optical fiber.
Receive Functions
7
The following are major receive functions of the 21D/21D-U OLIU circuit pack:
■
Receives an optical IS-3 or IS-3c signal and converts it to an electrical
STS-3 or STS-3c signal
■
Extracts STS-3 or STS-3c 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
■
Sends the three STS-1 signals to both TSIs.
Control Functions
7
The major control functions are as follows:
■
Protection switching for TSI circuit packs
■
Transport overhead processing
■
Inventory information (
CLEI code, date of manufacture, etc.).
Maintenance Signal Functions
7
The major maintenance signal functions are as follows:
■
Inserts and detects STS-1 path AIS
■
Inserts STS-1 path unequipped signal
■
Inserts and detects IS-3 line AIS
■
Inserts and detects far-end receive line failure (FERF)
■
Detects IS-3 line failures (LOS, LOF, AIS, and BER)
■
Detects IS-3 line signal degrade BER.
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 ...
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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 ...
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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 ...