Definition: The term dialup relates to network client access
to a LAN or WAN via telephone lines.
Types of dialup include V.34 and V.90 modem dialup as well
as Integrated Services Digital Network (ISDN). Dialup uses
special-purpose network protocols like Point-to-Point Protocol
As the popularity of the Internet exploded in the 1990s,
dialup remained the most common form of Internet access in
UK due mainly to its low cost. However, the performance of
dialup networking is relatively poor due to the limitations
of traditional modem technology. V.90 modem dialup handles
less than 56Kbps bandwidth and ISDN handles approximately
In the future, dialup access to the Internet will gradually
be phased out in favor of relatively faster and more modern
Related internet connection terminologies:-
Definition: "Modem" is an acronym for "Modulator
Demodulator." Traditionally, a modem converts data between
the analog form used on telephone lines and the digital form
used on computers for the purpose of computer-to-computer
communication. Standard modems can transmit data at a maximum
rate of 56,000 bits per second (bps) or 56kbps. However, inherent
limitations of the phone system translate to modem speeds
of 33.6kbps or lower in practice.
More recently, modems for cable and DSL service have come
to be known as digital modems and those used for traditional
dial-up networking as analog modems. The terminology is somewhat
misleading as modems all involve analog signaling; "digital"
actually refers to improved digital support at the access
provider's location and not within the modem itself. Nonetheless,
cable and DSL modems use broadband signaling techniques to
achieve dramatically higher network speeds than traditional
One kilobit per second (Kbps) equals 1000 bits per second
(bps). Kbps is also written as “kbps” that carries
the same meaning. Likewise, one megabit per second (Mbps)
equals one million bps and one Gigabit equals one billion
Network performance is best measured in bps, but sometimes
numbers are given in bytes per second (Bps). Then, one KBps
equals one kilobyte per second, one MBps equals one megabyte
per second, and GBps equals one gigabyte per second. Many
times people write KBps, for example, when they mean Kbps,
and it is important to be clear on this distinction.
Examples: V.90 modems support data rates up to 56 Kbps. Traditional
Ethernet supports data rates up to 10 Mbps and Fast Ethernet
100 Mbps. Gigabit Ethernet supports 1000 Mbps or 1 Gbps.
Also Known As: Kb/sec, Kb/s, Mb/sec, Mb/s, Gb/sec, Gb/s
The term broadband refers to any type of transmission technique
that carries several data channels over a common wire. DSL
service, for example, combines separate voice and data channels
over a single telephone line. In DSL, voice fills the low
end of the frequency spectrum and data fills the high end.
In home networking, "broadband" usually refers to
high-speed Internet access using this transmission technique.
Both DSL and cable modem are common broadband Internet technologies.
So-called broadband routers and broadband modems are network
devices that support both DSL and cable.
A baud is a unit of measure for analog signaling. At a minimum,
one baud corresponds to one bit per second (bps) although
at higher signaling speeds, multiple bits can be transferred
in a single baud. The term baud was popular in the early days
of modems, but it is no longer relevant in mainstream computer
lives on despite its limitations
We all want fast connections to the Net. (We also want inexpensive
and reliable connections, but that's a different story.) There
might be no more frustrating experience in computer networking
than trying to work over an unresponsive link.
The problem annoys us so badly that we feel compelled to
swap horror stories with our friends. We tend to use some
colorful language when talking about our predicament, especially
where that time-honored target of criticism -- the modem --
is concerned. Just the other day I received an email from
Fool.com, the online financial advocacy firm, that included
this off-topic rant:
Modems have become the focus of our disappointment with networks
for many reasons:
It takes a long time for a modem to make a dial-up
The modem link is slow once the connection is established
In many areas, no affordable alternatives to traditional modems
are available yet
Modem technology does not improve noticeably from year to
Modems cause us to miss important phone calls
Modems make funny noises
The name "modem" is geeky and boring
Did I mention that modems are slow?
The history of modems probably planted the seeds of our discontent.
Many of us began using the Net at home years ago when modems
ran at speeds of 9600 bits per second (bps) or lower. But
as the Net grew in popularity, the industry worked quickly
to build new standards and hardware. Soon 14,400 bps (14.4
kbps) modems appeared, and we noticed a significant increase
in performance. Then 19.2 kbps modems arrived, followed shortly
by 28.8 kbps modems, and the performance improvements were
obvious each time. Meanwhile, as the technology continued
to improve, the cost of connecting to the Net from home stayed
the same and sometimes even dropped.
High-Speed Modem Standards
Standard Speed Year
V.32 9.6 kbps 1984
V.32bis 14.4 kbps 1991
V.34 28.8 kbps 1995
V.90 56 kbps (33.6 kbps upstream) 1997-1998
V.92 56 kbps (48 kbps upload) 2000-2001