Telecommunication Circuits

ISDN
Circuit Bearer (B)
Channels
64 Kb/s
Data (D)
Channel
Bandwidth Comments
BRI 2 16 Kb/s 144Kb/s Basic Rate Interface
PRI - NA 23 64 Kb/s 1.544Mb/s Primary Rate Interface - North America
PRI - EUR 30 64 Kb/s 2.048Mb/s Primary Rate Interface - Europe


DS - North America, Asia
Circuit Voice
Channels
Bandwidth Comments
DS0 1 64Kb/s
DS1 24 1.544Mb/s
DS1C 48 3.152Mb/s
DS2 96 6.312Mb/s DS1 x 4
DS3 672 44.736Mb/s DS1 x 28
DS4 4032 274.176Mb/s DS3 x 6


E - Europe (ITU)
Circuit Voice
Channels
Bandwidth Comments
E1 30 2.048Mb/s
E2 120 8.448Mb/s E1 x 4
E3 480 34.368Mb/s E2 x 4
E4 1920 139.264Mb/s E3 x 4
E5 7680 565.148Mb/s E4 x 4


Sonet - Fiber Optic
Circuit Voice
Channels
Bandwidth Comments
OC1 672 51.84Mb/s DS3
OC3 2016 155.52Mb/s OC1 x 3
OC12 8064 622.08Mb/s OC3 x 4
OC48 32256 2.49Gb/s OC12 x 4



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