363-206-295
Circuit Pack Descriptions
Issue 1
December 1997
7-71
General Description of Operation
7
The 23H/23H-U OLIU circuit pack provides an interface between an OC-12 optical
line and 12 STS-1 signals and can be used in ring applications. The 23H/23H-U
OLIU provides 24 STS-1 input ports, 12 from service and 12 from protection TSI
circuit packs. It selects up to 12 STS-1 inputs, performs pointer processing and
frame alignment on each STS-1, inserts transport overhead, and combines and
scrambles the 12 STS-1 signals into an STS-12 (622.08 Mb/s) signal. The 23H/
23H-U OLIU then performs an electrical-to-optical conversion and outputs an
OC-12 optical signal for transmission on an optical fiber.
The 23H/23H-U OLIU receives an optical OC-12 signal and converts it to an
electrical signal. It frames on and descrambles the signal, processes the transport
overhead, and demultiplexes the STS-12 into 12 STS-1 signals. It performs
pointer processing and frame alignment on each STS-1. The 23H/23H-U OLIU
outputs 24 STS-1 signals, 12 to service and 12 to protection TSI circuit packs.
The 23H/23H-U OLIU performs maintenance and provisioning functions
associated with the STS-1 and OC-12 inputs and outputs. It provides access to
the line and section overhead in the STS-12 signal and interfaces to the TSI circuit
pack at the STS-1 rate and to the optical line at the OC-12 rate. It interfaces to the
SYSCTL and OHCTL and sends recovered timing signals to the TGS circuit
packs. The 23H/23H-U OLIU receives its timing signals from the TSI circuit packs.
Fiber access is via a pair of
ST (23H) or universal (23H-U) lightguide cable
connectors from the 23H/23H-U OLIU faceplate. Single-mode fiber is suggested
for optimum performance. The 23H/23H-U OLIU photonics meets SONET long
reach specifications. The 23H/23H-U is not hardened for uncontrolled
environments and is used in CO applications.
For 23H applications requiring external optical attenuators, the faceplate-mounted
transmit (OUT) connector is designed to accept a lightguide buildout. Available
buildouts are A3010B - 5 dB, A3010D - 10 dB, and A3010F - 15 dB. For loopback
testing requiring 19 dB attenuation, use the 4C Test Cable. For 23H-U
applications, see Section 10, "Technical Specifications," for a list of universal
buildout attenuators.
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 ...