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2. Synchronous optical networking - Wikipedia

   en.wikipedia.org/wiki/Synchronous_optical_networking

   SONET/SDH was used by internet access providers for large customers, and is no longer competitive in the supply of private circuits. Development has stagnated for the last decade (2020) and both suppliers of equipment and operators of SONET/SDH networks are migrating to other technologies such as OTN and wide area Ethernet.

3. Packet over SONET/SDH - Wikipedia

   en.wikipedia.org/wiki/Packet_over_SONET/SDH

   Packet over SONET/SDH, abbreviated POS, is a communications protocol for transmitting packets in the form of the Point to Point Protocol (PPP) over SDH or SONET, which are both standard protocols for communicating digital information using lasers or light emitting diodes (LEDs) over optical fibre at high line rates. POS is defined by RFC 2615 ...

4. Ethernet over SDH - Wikipedia

   en.wikipedia.org/wiki/Ethernet_over_SDH

   The SDH paths may be VC-4, VC-3, VC-12 or VC-11 paths. Up to 64 VC-11 or VC-12 paths can be concatenated together to form a single larger virtually concatenated group. Up to 256 VC-3 or VC-4 paths can be concatenated together to form a single larger virtually concatenated group. The paths within a group are referred to as "members".

5. Synchronous Ethernet - Wikipedia

   en.wikipedia.org/wiki/Synchronous_Ethernet

   Several type of networks can be used to transport the synchronous signal and could be combined indeed. Some of these networks are T1/E1, SONET/SDH and any rate, and SyncE. However legacy Ethernet is not suitable for transmitting synchronization signals. This is important because if the signal crosses a legacy Ethernet island then the ...

6. Ethernet over PDH over SONET/SDH - Wikipedia

   en.wikipedia.org/.../SDH

   Ethernet over PDH over SONET/SDH (EoPoS) is one of many techniques that provided Ethernet connectivity over non-Ethernet networks. EoPoS is a standardized method for transporting native Ethernet frames over the existing telecommunications optical infrastructure use both the established Plesiochronous Digital Hierarchy (PDH) and Synchronous Digital Hierarchy (SONET/SDH) transport technologies.

7. Optical transport network - Wikipedia

   en.wikipedia.org/wiki/Optical_transport_network

   OTN was designed to provide higher throughput (currently 400G) than its predecessor SONET/SDH, which stops at 40 Gbit/s, per channel. ITU-T Recommendation G.709 is commonly called Optical Transport Network (OTN) (also called digital wrapper technology or optical channel wrapper ).

8. Carrier Ethernet - Wikipedia

   en.wikipedia.org/wiki/Carrier_Ethernet

   Point-to-point Ethernet links are carried over SDH/SONET networks, making use of virtual concatenation (ITU-T G.707) and LCAS (Link Capacity Adjustment Scheme - ITU-T G.7042) to create an appropriate size carrier bundle, of the Generic Framing Procedure of SDH equipment, and takes advantage of the management and recovery features of SDH to ...

9. Digital cross-connect system - Wikipedia

   en.wikipedia.org/wiki/Digital_cross-connect_system

   A SONET 3/1 DCS will transmux and carry DS3 signals as STS-1 signals and groom TDM DS1/T1s using VT1.5 signals. The Central Office is where signals are generally switched and groomed to route DS1s needing to be mapped to other Optical or Electrical signals to get to different equipment or sent along to other Central Offices.