Why Use DS3?

If your business class DSL or T1 broadband service no longer has
enough speed to meet your bandwidth needs for video or data
transfer, you may be considering a move up to DS3 or T3 service.
According to my compatriot John Shepler of T1Rex.com…..here’s
when that makes sense and when it doesn’t.

What’s the difference between DS3 and T3? Ah, what’s in a
name? Both of these terms have their origination in the
T-carrier system, originally developed to provide high speed
“trunk” lines between telephone company offices. Everything is
based on DS0 or “digital signal level zero” which is a 64K bit
per second channel. Group 24 DS0 channels together and you have
a DS1. When the DS1 is connected to a wire circuit, it is called
a T1. T1 runs at 1.544 Mbps (megabits per second).

Not fast enough? OK, group 28 DS1 channels together (equivalent
to 28 T1 lines) and you have a DS3 or digital signal level 3
running at 44.736 Mbps, or 45 Mbps for short. Connect that to a
wire circuit and its called a T3. By the way, that T3 line is
equivalent to 672 voice channels. DS3 and T3 terms are often
used interchangeably.

So, are T3 and OC-3 equivalent? No, not really. T3 is the
“big daddy” of the T-carrier system. T3 is copper wire based,
although using coaxial cable rather than pairs of phone wires to
support the higher speed.

OC-3 is another animal entirely. It is part of the Optical
Carrier (OC) levels defined for a fiber optic transmission
system called SONET (Synchronous Optical Network). OC-3 runs at
155 Mbps verses T3 at 45 Mbps. That’s a big difference in speed
and, as you might imagine, cost.

OC-1 service is the equivalent of DS3 or T3. It provides 672
voice channels (or 64K data channels) and runs at 52 Mbps to
include the extra bits needed for the optical service. The
highest OC level you can get at present is OC-768 which runs at
39,512 Mbps or about 40 Gbps (Giga bits per second).

When does DS3 or T3 service make sense? If all you
require is 2 or 3 times the speed of a T1 line, then you are
better off with multiple T1 lines or connecting them together in
what is called bonded T1 service. Once you get past 6 or 8 T1
lines, the price of a T3 line is often competitive. Remember,
with T3 you get the equivalent of 28 T1 lines, which is a LOT
more capability.

DS3 Bandwidth generally makes sense for corporations that have a
need for high speed electronic data transfer between plant sites
or offices. Very large call centers, enterprise wide VoIP and IP
PBX systems, Internet service providers, universities, research
labs, video conference centers and software development
companies are also good candidates for T3 lines with DS3 level

DS3 transport may be a cost effective substitute for point to
point microwave for MPEG Broadcast Video Transmission. It is
also applicable for Surveillance Cameras, CCTV Systems, and VLAN

If a full DS3 line is more bandwidth than you really need, it is
also possible to get Fractional DS3, which gives you a portion
of full DS3 bandwidth at a lower cost. Of course, DS3 is also
available in multiples to increase bandwidth, similar to bonded
T1 service.

How much does DS3 (T3) cost? Glad you asked. You can get
an instant online quote if you’ll be so kind as to tell us where
you want the service located, and provide some basic contact
information so we can help you pick the optimum service for your
business from available vendors in your area. Just use the form
on DS3-Bandwidth.com and
indicate what service options you are interested in

Source by Michael Lemm

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