"विभिन्न युक्तियों की आंकड़ा-विनिमय दर" (अनुभाग) सम्पादित करें

== [[मॉडेम]] (Modems) ==
ध्यान रहे कि यहाँ दिये हुए आंकड़े अधिकतम मान प्रदर्शित कर रहे हैं। वास्त्विक स्थितियों में (जैसे वैद्युत शोर (न्वायज) की स्थिति में) इनसे कम दर पर ही आंकडा-विनिमय हो पाता है।<ref>{{Cite web |url=http://www.itu.int/rec/T-REC-V/en |title=संग्रहीत प्रति |access-date=19 जनवरी 2008 |archive-url=https://web.archive.org/web/20140127142624/http://www.itu.int/rec/T-REC-V/en |archive-date=27 जनवरी 2014 |url-status=live }}</ref> 
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| Modem 110 [[baud]] || '''0.11 kbit/s''' || 0.010 kB/s (~10 cps)<ref name=modem>300 baud modems operating at 30 characters per second, were often described as "reading speed" since the characters scrolled across the screen at the same rate as most people can read. All modems are assumed to be in serial operation with 1 start bit, 8 data bits, no parity, and 1 stop bit (2 stop bits for 110-baud modems). Therefore, a total of 10 bits (11 bits for 110-baud modems) are needed to transmit each 8-bit byte. The "bytes" column reflects the net data transfer rate after the protocol overhead has been removed.</ref>
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| Modem 300 baud ([[Bell 103]])([[V.21]]) || '''0.3 kbit/s''' || 0.03 kB/s (~30 cps)<ref name=modem />
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| Modem 1200 (600 baud) ([[Bell 212A]])([[V.22]]) || '''1.2 kbit/s''' || 0.12 kB/s (~120 cps)<ref name=modem />
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| Modem 2400 (600 baud) ([[V.22bis]]) || '''2.4 kbit/s''' || 0.24 kB/s<ref name=modem />
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| Modem 4800 (1600 baud) ([[V.27ter]]) || '''4.8 kbit/s''' || 0.48 kB/s<ref name=modem />
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| Modem 9600 (2400 baud) ([[V.32]]) || '''9.6 kbit/s''' || 0.96 kB/s<ref name=modem />
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| Modem 14.4 (2400 baud) ([[V.32bis]]) || '''14.4 kbit/s''' || 1.44 kB/s<ref name=modem />
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| Modem 19.2 (2400 baud) ([[V.34]]) || '''19.2 kbit/s''' || 1.92 kB/s<ref name=modem />
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| Modem 28.8 (3200 baud) ([[V.34]]) || '''28.8 kbit/s''' || 2.88 kB/s<ref name=modem />
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| Modem 33.6 (3429 baud) ([[V.34]]) || '''33.8 kbit/s''' || 3.38 kB/s<ref name=modem />
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| Modem 56k (8000/3429 baud) ([[V.90]]) down/up || '''56.0/33.6 kbit/s'''<ref name="56k">[[56K modem]]s: V.90 and V.92 capacity can only be achieved when the upstream (service provider) end of the connection is digital. In addition, certain telecommunications administrations limit the signal strength the modem can transmit onto the telecommunications circuit, which in turn limits the actual maximum data rate to less than the theoretical maximum. In the USA, this limited the possible downstream maximum to 53.3 kbit/s.</ref> || 5.6/3.36 kB/s<ref name=modem />
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| Modem 56k (8000 baud) ([[V.92]]) down/up || '''56.0/48.0 kbit/s'''<ref name="56k" /> || 5.6/4.8 kB/s<ref name=modem />
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| [[ISDN]] [[Basic Rate Interface]] & [[Primary Rate Interface]] data channel (B-channel) || '''64 kbit/s'''<ref name=isdn>Note that effective aggregate bandwidth for an ISDN installation is typically higher than the rates shown for a single channel due to the use of multiple channels. A [[basic rate interface]] (BRI) provides 2 "B" channels and one "D" channel. Each B channel provides 64 kbit/s bandwidth and the 'D' channel carries signalling (call setup) information. B channels can be bonded to provide a 128 kbit/s data rate. Primary rate interfaces (PRI) vary depending on whether the region uses E1 (Europe, world) or T1 (North America) bearers. In E1 regions, the PRI carries 30 B-channels and 1 D-channel; in T1 regions the PRI carries 23 B-channels and 1 D-channel. The D-channel has different bandwidth on the two interfaces.</ref> || 8 kB/s
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| [[IDSL]] || '''144 kbit/s''' || 18 kB/s
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| [[HDSL]] ITU G.991.1 || '''1544 kbit/s''' || 193kB/s
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| [[MSDSL]] || '''2,000 kbit/s''' || 250 kB/s
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| [[SDSL]] || '''2,320 kbit/s''' || 290 KB/s
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| [[SHDSL]] ITU G.991.2 || '''5690 kbit/s''' || 711 kB/s
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| [[Asymmetric Digital Subscriber Line|ADSL]]<ref>ADSL connections will vary in throughput from 64 kbit/s to several Mbit/s depending on configuration. Most are commonly below 2 Mbit/s. Some ADSL and SDSL connections have a higher bandwidth than T1 but their bandwidth is not guaranteed, and will drop when the system gets overloaded, whereas the T1 type connections are usually guaranteed and have no contention ratios.</ref> down/up || '''8000/1024 kbit/s''' || 1000/128 kB/s
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| [[ITU G.992.3/4|ADSL2]] down/up || '''12,000/3500 kbit/s''' || 1500/448 kB/s
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| [[ITU G.992.5|ADSL2Plus]] down/up || '''24,000/3500 kbit/s''' || 3000/448 kB/s
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| [[DOCSIS]] v1.0<ref name="DOCSIS 10">[http://www.cablemodem.com/specifications/specifications10.html DOCSIS 1.0] {{Webarchive|url=https://web.archive.org/web/20060613164936/http://www.cablemodem.com/specifications/specifications10.html |date=13 जून 2006 }} includes technology which first became available around 1995-1996, and has since become very widely deployed. [http://www.cablemodem.com/specifications/specifications11.html DOCSIS 1.1] {{Webarchive|url=https://web.archive.org/web/20060613164706/http://www.cablemodem.com/specifications/specifications11.html |date=13 जून 2006 }} introduces some security improvements and Quality-of-Service ([[QoS]]).</ref> ([[Cable modem]]) down/up || '''38,000/10,000 kbit/s''' || 4750/1250 kB/s
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| [[DOCSIS]] v2.0<ref name="DOCSIS 20">[http://www.cablemodem.com/specifications/specifications20.html DOCSIS 2.0] {{Webarchive|url=https://web.archive.org/web/20090904062229/http://www.cablemodem.com/specifications/specifications20.html |date=4 सितंबर 2009 }} specifications provide increased upstream throughput for symmetric services.</ref> ([[Cable modem]]) down/up || '''40,000/30,000 kbit/s''' || 5000/3750 kB/s
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| [[DOCSIS]] v3.0<ref name="DOCSIS 30">[http://www.cablemodem.com/primer/ DOCSIS 3.0] {{Webarchive|url=https://web.archive.org/web/20060619181104/http://www.cablemodem.com/primer/ |date=19 जून 2006 }} is currently in development by the [[CableLabs]] consortium and is slated to include support for [[channel bonding]] and [[इंटरनेट प्रोटोकॉल संस्करण ६|IPv6]].</ref> ([[Cable modem]]) down/up || '''160,000/120,000 kbit/s''' || 20,000/15,000 kB/s
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| [[Uni-DSL]] || '''200,000 kbit/s''' || 25,000 kB/s
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| [[VDSL]] ITU G.993.1 || '''200,000 kbit/s''' || 25,000 kB/s
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| [[VDSL2]] ITU G.993.2 || '''250,000 kbit/s''' || 31,250 kB/s
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| align="left" colspan=3 |