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A DS level and framing specification for digital signals in the North American digital transmission hierarchy. A DS2 signal uses 96 PCM channels and has a transmission rate of 6.31 Megabits per second, twice that of DS1C.
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)


(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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References in periodicals archive ?
Of the 108 slides in the DS2 dataset, 2 slides contained only ITCs and were excluded from the performance metrics as well to match diagnostic guidelines (21) and the Camelyon16 protocol, (14) where no slides contained only ITCs.
Data organization in the NVivo 10 software by the participants, the handwritten n or data recording d designator, the question number, and the element number were coded as follows DS1, DS2 to DS10.
E1, E2, E3, and E4 represent DS1, DS2, CK1 and CK2, respectively.
Kaip ir mineta, bandiniai buvo suskaidyti i dvi grupes pagal mikrouPpilda: vieni su maltu kvarciniu smeliu (nelyginiai bandiniu kodai: DS1, DS3, DS5, DS7, DS9 ir DS11), kiti su silicio dulkemis (lyginiai bandiniu kodai: DS2, DS4, DS6, DS8, DS10, DS12).
The SkyRaider DS2.3 Plus can make single exposures as long as 16 minutes and 45 seconds.
The combination of faster data transfer, carrier aggregation, and rugged reliability makes the Skyus DS2 ideal for solutions that require the freedom of wireless mobility and demand ultimate performance.
Under the themes "evolution of production visualization" and "faster factory control cycle," Okuma and Hitachi created an experimental model for high-efficiency production supporting mass customization in the new plant, DS2, by integrating the know-how of the two companies.
Two of them (DS2 and DS3) learned the four pairs of relations after two exclusion trials.
For any PPT adversary A which can make at most [q.sub.key] = [q.sub.key]([lambda]) key generation queries and [q.sub.Enc] = [q.sub.Enc]([lambda]) encryption queries with running time t', there exist algorithm Br on DS1, [B.sub.2] on DS2, [B.sub.3] on DS3, and [B.sub.4] on DS-BDDH with running time t' + O(n[[lambda].sup.c]([q.sub.key] + [q.sub.Enc])), respectively, for some constant c [member of] N, such that
No significant difference was observed between DS1, DS2, and DS3, nor between DS4 and DS5.
Here, the DS1, DS2, DS3, and DS4 represent four equal data sets of whole data for CV analysis whereas R[F.sub.mean], R[F.sub.sd], R[F.sub.sc], R[F.sub.min], and R[F.sub.max] represent mean, standard deviation, skewness coefficient, minimum, and maximum river flows, respectively.