Classification of DS (Digital Signal)

This only serves as guide for those DS signal, sometime I forgot their respective bandwidth allocation, so here are the following:

(Digital Signal) A classification of digital circuits. The DS technically refers to the rate and format of the signal, while the T designation refers to the equipment providing the signals. In practice, "DS" and "T" are used synonymously; for example, DS1 and T1, DS3 and T3.

NORTH AMERICA, JAPAN, KOREA, ETC.

      Voice
Service  Channels   Speed
DS0         1            64 Kbps
DS1        24         1.544 Mbps  (T1)
DS1C       48         3.152 Mbps  (T1C)
DS2        96         6.312 Mbps  (T2)
DS3       672        44.736 Mbps  (T3)
DS4      4032       274.176 Mbps  (T4)

EUROPE (ITU)

      Voice
Service  Channels   Speed (Mbps)
E1         30         2.048
E2        120         8.448
E3        480        34.368
E4       1920       139.264
E5       7680       565.148

SONET CIRCUITS

Service          Speed (Mbps)
STS-1   OC1       51.84 (28 DS1s or 1 DS3)
STS-3   OC3      155.52 (3 STS-1s)
STS-3c  OC3c     155.52 (concatenated)
STS-12  OC12     622.08 (12 STS-1s, 4 STS-3s)
STS-12c OC12c    622.08 (12 STS-1s, 4 STS-3c's)
STS-48  OC48    2488.32 (48 STS-1s, 16 STS-3s)

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Info about OC
(Optical Carrier) The transmission speeds in SONET/SDH networks.

 SONET CIRCUITS

Optical  Electrical
Channel  Channel         Speed (Mbps)

        VT-1.5       1.7
OC-1     STS-1       51.84 (28 DS1s or 1 DS3)
OC-3     STS-3      155.52 (3 STS-1s)
OC-3c    STS-3c     155.52 (concatenated)
OC-12    STS-12     622.08 (12 STS-1, 4 STS-3)
OC-12c   STS-12c    622.08 (12 STS-1, 4 STS-3c)
OC-48    STS-48    2488.32 (48 STS-1, 16 STS-3)
OC-192   STS-192   9953.28 (192 STS-1, 64 STS-3)
OC-768   STS-768  39813,12 (768 STS-1, 256 STS-3)


OC  = Optical Carrier
STS = Synchronous Transport Signal