Study: Broadband leaps past dial-up

TalkBack 3 of 5:

Next »

« Previous

• Thread View
• Flat View

Broadband defined

From: http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci211706,00.html

In general, broadband refers to telecommunication in which a wide band of frequencies is available to transmit information. Because a wide band of frequencies is available, information can be multiplexed and sent on many different frequencies or channels within the band concurrently, allowing more information to be transmitted in a given amount of time (much as more lanes on a highway allow more cars to travel on it at the same time). Related terms are wideband (a synonym), baseband (a one-channel band), and narrowband (sometimes meaning just wide enough to carry voice, or simply "not broadband," and sometimes meaning specifically between 50 cps and 64 Kpbs).

Various definers of broadband have assigned a minimum data rate to the term. Here are a few:

* Newton's Telecom Dictionary: "...greater than a voice grade line of 3 KHz...some say [it should be at least] 20 KHz."
* Jupiter Communications: at least 256 Kbps.
* IBM Dictionary of Computing: A broadband channel is "6 MHz wide."

It is generally agreed that Digital Subscriber Line (DSL) and cable TV are broadband services in the downstream direction.
--------------
From: http://www.webopedia.com/TERM/B/broadband.html

A type of data transmission in which a single medium (wire) can carry several channels at once. Cable TV, for example, uses broadband transmission. In contrast, baseband transmission allows only one signal at a time.

Most communications between computers, including the majority of local-area networks, use baseband communications. An exception is B-ISDN networks, which employ broadband transmission.
----------------
From: http://www.part-15.org/public/kb/kb.asp?viewq=199

# How is "broadband defined"?

BROADBAND
Broadband is a descriptive term for evolving digital technologies that provide consumers a signal switched facility offering integrated access to voice, high-speed data service, video-demand services, and interactive delivery services.
----------------
Dial-up (or POTS) is defined as:

From: http://www.webopedia.com/TERM/P/POTS.html

Short for plain old telephone service, which refers to the standard telephone service that most homes use. In contrast, telephone services based on high-speed, digital communications lines, such as ISDN and FDDI, are not POTS. The main distinctions between POTS and non-POTS services are speed and bandwidth. POTS is generally restricted to about 52 Kbps (52,000 bits per second).

The POTS network is also called the public switched telephone network (PSTN).

POTS should not be confused with pot, an abbreviation of potentiometer.
------------
Analog phone liines are 9600 baus, faxes are 14,400 baud (compressed over a 9600 baud pipe). V.90 (the 56K standard) transmits compressed data at a rate of 53000 baud over said 9600 baud line.

Consult a local analog telco for more details.

Posted by: B.O.F.H.   Posted on: 08/18/04 You are currently: a Guest | Members login | Terms of Use

Alert moderator to an offensive message

Subscribe to this discussion via Email or RSS

SponsoredWhite Papers, Webcasts, and Downloads

• Five Steps to Determine When to Virtualize YourServers VMware Server virtualization isn't just for big companies. Entry-level ... Download Now
• Key Strategies for Federal Agencies - Safe and Cost Effective Migration for Legacy Hardware GovConnection The federal government has mandated that federal agencies reduce energy ... Download Now
• VMware Infrastructure: A Guide to Bottom-Line Benefits VMware Frustrated by the costs of maintain ever larger data centers?or building ... Download Now