The following blog has been compiled to provide information for the different type(s) of WAN Technologies. Keep in mind that Ethernet is a fast growing WAN technology with companies moving to deploy VPLS, MPLS and TLS Circuits for WAN connectivity. As a Cisco network engineer you will still encounter legacy WAN connections.
Digital Subscriber Line (DSL) technologies are fairly common in the United States and other developing nations that provide broadband to customers over existing telephone wire infrastructure. The is however the limitation of distance which basically means the subscriber can be so far from the DSLAM (DSL Access Multiplexer) which is commonly known as the “central office”.
Common NameStandards NameDownstream RateUpstream RateExt. DownEst. UpaDSLG.992.1 G.DMT12Mbit/s1.3Mbit/s1.5MB/s166KB/saDSL+ITU G992.4/524Mbit/s1.0Mbit/s3MB/s128KB/sHDSLG.991.12.048Mbit/s2.048Mbit/s262KB/s262KB/sSHDSLG.991.22.265Mbit/s2.265Mbit/s290KB/s290KB/sVDSLG.933.152Mbit/s19.2Mbit/s6.5MB/s2MB/sVDSL2G.991.2250Mbit/s250Mbit/s21.25MB/s21.25MB/sIDSLANSI T1.601144Kbit/s144Kbit/s18KB/s18KB/sRADSL*ANTI TR598Mbit/s8Mbit/s1MB/s1MB/sNOTE: Bandwidth is shown at maximum theoretical speed using the latest standard.*RADSL – Rate-Adaptive Asymmetric Digital Subscriber Line – Adjusts the upstream/downstream bandwidth in a tradeoff.Integrated Services Digital Networks (ISDN)
ISDN Lines have seen their glory in the 90’s and is now considered a legacy technology however you may encounter this technology in third world countries where the hardware is extremely cheap to acquire and deploy.
Link TypeLink BandwidthEst. ThroughputAdditional InformationBRI128Kbit/s16KB/s2x 64Kb B Channels & 1x 16k D ChannelPRI – NA (AKA: T1)1.544Mbit/s197KB/s23x 64Kb B Channels & 1x 64k D ChannelPRI – EU (AKA: E1)2.048Mbit/s262KB/s30x 64Kb B Channels & 1x 64k D ChannelT CarriersLink TypeLink BandwidthEst. ThroughputAdditional InformationT1 (DS1)1.544Mbit/s197KB/s24 DS0 ChannelsE1 (DS1EU)2.048Mbit/s262KB/s30 Channels + 2DT1c (DS1c)3.152Mbit/s403KB/s48 ChannelsT2 (DS2)6.312Mbit/s808KB/s96 Channels (uncommon)T3 (DS3)44.736Mbit/s5.59MB/s672 ChannelsT4 (DS4)274.176Mbit/s34.3MB/s4032 ChannelsOptical CarriersLink TypeLink BandwidthEst. ThroughputAdditional InformationOC-1 / STS-151.84Mbit/s6.48MB/sOC-3 / STS-3155.52Mbit/s19.44MB/sOC-9 / STS-9*466.56Mbit/s58.32MB/sOC-12 / STS-12622.08Mbit/s77.76MB/sOC-18 / STS-18*933.12Mbit/s116.64MB/sOC-24 / STS-24*1244.16Mbit/s155.52MB/sOC-36 / STS-36*1866.24Mbit/s233.28MB/sOC-48 / STS-482488.32Mbit/s311.04MB/sUsed in USAOC-96 / STS-96*4976.64Mbit/s622.08MB/sOC-192 / STS-1929953.28Mbit/s1.24GB/sInternet BackboneOC-256 / STS-25613.271Gbit/s1.659GB/sInternet BackboneOC-768 / STS-76839.813Gbit/s4.977GB/sInternet BackboneOC-3072 / STS-3072159.252Mbit/s19.44GB/sNOTE: * Several of the listed links are not standardized and/or commonly used including 9, 18, 24 and 36.
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