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Unlike SDH/SONET, the line rate is increased by maintaining the G.709 frame structure (4 rows x 4080 columns) and decreasing the frame period (in SDH/SONET the frame structure is increased and the frame period of 125 μs is maintained).
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coding calculated across the payload (OPU) columns. This allows detection and correction of bit errors due to signal impairments during transmission. The FEC code also extends the distance the optical signal can travel before requiring
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describes a means of communicating data over an optical network. It is a standardized method for transparent transport of services over optical wavelengths in
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systems. It is also known as
Optical Transport Hierarchy (OTH) standard. The first edition of this protocol was approved in 2001.
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567:(TCM), End to End performance monitoring, connectivity monitoring, signal quality supervision and
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The G.709 OTUk signal is positioned as a server layer signal for various client signals, e.g.
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816:"ITU standards enhance capabilities of the Optical Transport Network"
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The frame structure defined in G.709 is constructed of 4 areas:
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498:(where k=0, 1, 2, 2e, 3, 3e2, 4 or flex). Work on support for
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contains the OPUk with additional overhead bytes (e.g. TTI,
845:"G.709: Interfaces for the optical transport network"
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Typical client signals and corresponding G.709 rates
536:is the section and includes framing, TTI, BIP8 and
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977:Telecommunications-related introductions in 2001
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883:represents the ODUk data rate as follows:
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506:client signals is currently in progress.
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516:is the area in which payload is mapped.
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546:– The standard FEC code (described in
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444:https://www.itu.int/rec/T-REC-G.709
14:
947:Download the G.709 Recommendation
907:flex = a multiple of ~1.24 Gbit/s
921:Fractional portion is truncated
855:from the original on 2021-06-15
826:from the original on 2021-04-09
967:ITU-T G Series Recommendations
600:OTUk frequency accuracy (ppm)
1:
569:General Communication Channel
504:Common Public Radio Interface
565:Tandem Connection Monitoring
993:
594:OPUk Payload Rate (kbit/s)
972:Optical Transport Network
935:Generic Framing Procedure
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460:Optical Transport Network
389:Optical Transport Network
386:
904:4 = ~104.79 Gbit/s
901:3e2 = 41.79 Gbit/s
895:2e = ~10.40 Gbit/s
591:OTUk Line Rate (kbit/s)
588:OTN Line Signal (G.709)
23:Internet protocol suite
898:3 = ~40.32 Gbit/s
892:2 = ~10.04 Gbit/s
597:OTUk frame period (μs)
559:G.709 offers advanced
962:ITU-T recommendations
889:1 = ~2.50 Gbit/s
886:0 = ~1.24 Gbit/s
563:capabilities such as
802:Notes and references
455:Recommendation G.709
16:ITU-T recommendation
458:Interfaces for the
387:Interfaces for the
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582:Client Signal Type
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30:Application layer
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435:Freely available
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195:Transport layer
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941:External links
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412:Latest version
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857:. Retrieved
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828:. Retrieved
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718:/Transcoded
558:
552:Reed–Solomon
530:, TCM etc.).
508:
470:
457:
451:
450:
422:Organization
404:Year started
341:
301:
234:
184:
879:The letter
849:www.itu.int
820:www.itu.int
785:100,376,298
782:111,809,973
956:Categories
859:2021-06-15
830:2021-04-09
775:100GBASE-R
758:41,611,131
755:44,583,355
730:40,150,519
727:43,018,413
691:10,356,012
688:11,095,727
656:10,037,629
653:10,709,225
500:InfiniBand
312:Link layer
748:10GBASE-R
720:40GBASE-R
703:SONET/SDH
677:10GBASE-R
637:SONET/SDH
625:2,488,320
622:2,666,057
606:SONET/SDH
561:OAM&P
473:SDH/SONET
417:June 2020
929:See also
853:Archived
824:Archived
770:Ethernet
746:Up to 4
742:Ethernet
707:Ethernet
668:Ethernet
485:Ethernet
399:In force
716:STM-256
712:STS-768
642:STS-192
571:(GCC).
550:) is a
440:Website
432:License
342:more...
326:Tunnels
302:more...
235:more...
185:more...
174:TLS/SSL
129:ONC/RPC
66: (
752:OTU3e2
694:11.766
659:12.191
646:STM-64
628:48.971
615:STM-16
611:STS-48
540:bytes.
528:GCC1/2
396:Status
391:(OTN)"
169:Telnet
68:HTTP/3
788:1.167
761:2.928
733:3.034
697:±100
685:OTU2e
681:10GFC
662:± 20
631:± 20
548:G.975
462:(OTN)
453:ITU-T
426:ITU-T
382:G.709
296:IPsec
74:HTTPS
791:±20
779:OTU4
764:±20
736:±20
724:OTU3
650:OTU2
619:OTU1
538:GCC0
534:OTUk
524:BIP8
520:ODUk
514:OPUk
502:and
496:ODUk
491:and
466:DWDM
407:2001
291:IGMP
271:ICMP
229:QUIC
224:RSVP
219:SCTP
214:DCCP
179:XMPP
159:SNMP
154:SMTP
139:RTSP
114:OSPF
104:NNTP
99:MQTT
94:MGCP
89:LDAP
79:IMAP
64:HTTP
44:DHCP
544:FEC
493:OTN
477:ATM
415:6.0
336:MAC
331:PPP
321:ARP
286:ECN
281:NDP
209:UDP
204:TCP
164:SSH
149:SIP
144:RIP
134:RTP
124:PTP
119:POP
109:NTP
84:IRC
59:FTP
54:DNS
39:BGP
958::
914:^
868:^
851:.
847:.
822:.
818:.
526:,
487:,
483:,
481:IP
479:,
475:,
275:v6
264:v6
259:v4
254:IP
48:v6
881:k
862:.
833:.
714:/
705:/
679:/
670:/
644:/
613:/
370:e
363:t
356:v
277:)
273:(
70:)
50:)
46:(
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.