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What you need to know about Fiber Optics Bandwidth.

(Glas-Faser oder auch "urdeutsch" LWL = Licht-Wellen-Leiter)

Here are some Keys with its explanation :

  • "SDH" = Synchronous Data Hirarchy
  • "OC" = Optical Carrier levels (SONET)
  • "STM" = Synchronous Transport Modules (SDH)
  • "ATM" = Asynchronus Transfer Mode
  • "POS" = Packet over SONET / SDH frames
  • "HDLC" = High-Level Data Link Control
  • "PPP" = Point-to-Point Protocol
  • "STS" =
  • "FDDI" = Fibre Distributed Data Interface

There a lot more 3 character shortcuts. We will add them later. With these here you can (at least) listen to the experts, make not a dump face, but smile.

  • SM = single mode / long distance
  • MM = multi mode / short distance
  • "E" = E-carrier system equivalent of "T" that uses all 8 bits per channel; used in Europe, Australiy, South America, = countries other than U.S. Canada, and Japan....
  • "T" = T-carrier system in U.S., Canada, and Japan....
  • "DS"= digital signal (that travels on the T-carrier or E-carrier)...

n Europe, South America and parts of Asia we have E1 and E3 and in the US and Canada and Japan they use T1 and T3 (DS3).

Parts of this table were received by e-mail from an unknown internet user.

Carrier Technology rated Speed (brutto) Physical Medium explanation
ISDN - the basis
of all calculations
BRI: 64 (Kilobit per second) to 128K
PRI: 23 (T-1) or 30 (E1)
assignable 64K channels plus control channel
BRI: (basic rate interface) Twisted-pair
PRI: (primary rate interface)
T1 or E1
BRI: faster home and small business access -
PRI: Medium and large enterprise access
DS1/T-1 1.544 Mbps Twisted-pair, coaxial cable, or optical fiber Large US-company to US-ISP and
US-ISP to Internet infrastructure
E-1 2.048 Mbps Twisted-pair, coaxial cable, or optical fiber 32-channel European 2 Mbps Standards
T-1C (DS1C) 3.152 Mbps Twisted-pair, coaxial cable, or optical fiber Large company to ISP
ISP to Internet infrastructure
DS2/T-2 6.312 Mbps Twisted-pair, coaxial cable, or optical fiber Large company to ISP
ISP to Internet infrastructure
E-2 8.448 Mbps Twisted-pair, coaxial cable, or optical fiber Carries 4 multiplexed E1 signals
Ethernet 10 Mbps 10BASE-T (twisted-pair); 10BASE-2 or -5 (coaxial cable); 10BASE-F (optical fiber) Most popular business local area network (LAN)
IBM Token Ring/802.5 16 Mbps (also 4 Mbps) Twisted-pair, coaxial cable, or optical fiber Second most commonly-used local area network after Ethernet
E-3 CCITT G.751 34.368 Mbps Twisted-pair or optical fiber Carries 16 x E1 signals
T-3 M13/Cbit 44.736 Mbps Twisted-pair or optical fiber Carries ?? x T1 signals
OC-1 51.84 Mbps Optical fiber ISP to Internet infrastructure -
This is the Basic rate for SONET
Fast Ethernet 100 Mbps 100BASE-T4 (twisted pair); 100BASE-TX (twisted pair); 100BASE-FX (optical fiber) Workstations with 10 Mbps Ethernet cards can plug into a Fast Ethernet LAN
FDDI 100 Mbps Optical fiber Large, wide-range LAN usually in a large company or a larger ISP
T-3D (DS3D) 135 Mbps Optical fiber ISP to Internet infrastructure
Smaller links within Internet infrastructure
E4 139.264 Mbps Optical fiber Carries 4 x E3 channels
Up to 1,920 simultaneous voice conversations
OC-3 / STM-1 155.52 Mbps Optical fiber Large company backbone
Internet backbone
E5 565.148 Mbps Optical fiber Carries 4 E4 channels
Up to 7,680 simultaneous voice conversations
OC-12 / STM-4 622.08 Mbps Optical fiber Internet backbone
Gigabit Ethernet 1 Gbps Optical fiber (and "copper" up to 25 meters) Workstations/networks with 10/100 Mbps Ethernet will plug into Gigabit Ethernet switches
OC-24 1.244 Gbps Optical fiber Internet backbone
SciNet 2.325 Gbps (15 OC-3 lines) Optical fiber Part of the vBNS backbone
OC-48 / STM-16 2.488 Gbps Optical fiber Internet backbone
OC-192 / STM-64 10 Gbps (9953,28 Mbps) Optical fiber Backbone
OC-256 13.271 Gbps Optical fiber Backbone
OC-768 40 Gbps Optical fiber Backbone
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