What is an OC12?
OC-12 is a network line with transmission speeds of up to 622.08 Mbit/s (payload: 601.344 Mbit/s; overhead: 20.736 Mbit/s). OC-12 lines are commonly used by ISPs as wide area network (WAN) connections.
How many T1 are in a DS3?
A DS3 line (sometimes also referred to as T3) is a dedicated, high bandwidth, fiber circuit with a speed of 45 Mbps. This is equivalent to 28 T1 lines (or 672 regular phone lines).
What is OC level?
OC-x stands for Optical Carrier Levels, is a set of signaling rates designed for transmission over Synchronous Optical Network (SONET) networks. Optical carrier (OC-x) levels also apply to Asynchronous Transfer Mode (ATM) networks. The term “optical carrier” indicates that SONET runs over fiber-optic cabling.
Where is Sonet used?
Both SDH and SONET are widely used today: SONET in the United States and Canada, and SDH in the rest of the world. Although the SONET standards were developed before SDH, it is considered a variation of SDH because of SDH’s greater worldwide market penetration.
How many DS 1s can you support with a single OC 192?
OC-192 operates at 9,953 Mbps and is equivalent to 5,376 DS-1s (same as a T-1) or 192 DS-3s (same as a T-3). OC-192 is in use for backbone networks.
How many DS3 are in OC3?
3 DS3
Would you be surprised to learn that one OC3 can carry 3 DS3, 84 DS1, or 2,016 DS0 channels? The T1 or T3 service you order might be delivered on a dedicated copper wire circuit or it might be dropped off from a larger OC3 fiber optic cable.
How many DS3 are in OC12?
Think of a OC12 as a train car. It holds 4 beer trucks, or 8,064 individual beers. (1 OC12 = 4 OC3’s = 12 DS3’s = 336 DS1’s = 8,064 DS0’s). Think of an OC48 as a train with 4 rail cars, or 32,256 individual beers.
What does OC-3c stand for in optical transmission?
OC-3c (“c” stands for “concatenated”) concatenates three STS-1 (OC-1) frames into a single OC-3 look alike stream. The three STS-1 (OC-1) streams interleave with each other so that the first column is from the first stream, the second column is from the second stream, and the third is from the third stream.
What is the transmission rate of SONET OC-192?
OC-192 / STM-64 / 10G SONET OC-192 is a network line with transmission speeds of up to 9953.28 Mbit/s (payload: 9510.912 Mbit/s (9.510912 Gbit/s); overhead: 442.368 Mbit/s).
Why does OC-3c carry only one column of path overhead?
Concatenated STS (OC) frames carry only one column of path overhead because they cannot be divided into finer granularity signals. Hence, OC-3c can transmit more payload to accommodate a CEPT-4 139.264 Mbit/s signal.
What is the transmission rate of an OC-12 line?
OC-12 / STM-4 OC-12 is a network line with transmission speeds of up to 622.08 Mbit/s (payload: 601.344 Mbit/s; overhead: 20.736 Mbit/s). OC-12 lines are commonly used by ISPs as wide area network (WAN) connections. While a large ISP would not use an OC-12 as a backbone (main link), it would for smaller, regional or local connections.