DS

DS

(engineering)

Doppler sonar

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

drop siding, novelty siding, rustic siding

drop siding

An exterior wall cladding of wooden boards (or strips of other material such as aluminum or vinyl), which are tongued and grooved or rabbeted and overlapped so that the lower edge of each board interlocks with a groove in the board immediately below it.

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DS

On drawings, abbr. for downspout.

McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

DS

(1) See Nintendo DS.

(2) (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. See OC.

NORTH AMERICA, JAPAN, KOREA, ETC.VoiceService  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        SpeedService  Channels    (Mbps)

 E1         30         2.048
 E2        120         8.448
 E3        480        34.368
 E4       1920       139.264
 E5       7680       565.148


 SONET CIRCUITSOptical  Electrical    SpeedChannel  Channel      (Mbps)

 OC-1      STS-1        51.84
 OC-3      STS-3       155.52
 OC-3c     STS-3c      155.52
 OC-12     STS-12      622.08
 OC-12c    STS-12c     622.08
 OC-48     STS-48     2488.32
 OC-192    STS-192    9953.28
 OC-768    STS-768   39813.12

 OC  = Optical Carrier
 STS = Synchronous Transport Signal
   c = concatenated

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