One minor detail - you forgot the 1. in front of the 544Mb/s.
-----Original Message-----
From: m. jean stockton [mailto:[EMAIL PROTECTED]]
Sent: Thursday, December 28, 2000 8:00 PM
To: John Hardman; [EMAIL PROTECTED]
Subject: RE: T3 and Ds3
Hope this helps to clarify things.
Makeeda
"DS1 (Digital Service Level 1)
544Mb/s. Another name for a T1. The specific difference between a DS1 and a
T1 is that the T1 is on copper and comes with a -135-V battery voltage, and
the DS1 is a dry circuit, on copper or fiber-optic lines, with no battery
voltage. Other than that, they are the same. A DS1 has a total bandwidth or
transmission speed of 1.544 Mb/s. The 1.544 Mb/s is divided into 24 64Kb/s
channels. A DS1 (T1) is available in several different packages that offer
different line formats and framing formats. The package that a customer
requests from a phone company depends on what they want to use the DS1 for
and what kind of equipment they have. Telecommunications customers use DS1
circuits as private lines to connect data devices from one geographical
place to another or to transport large amounts of dial tone to the premises.
DS1 circuits are also used to connect directly to a long-distance company
for broadband WAN service. Telecommunications companies also use DS1 (they
are T1 circuits within their own network) circuits to provide more telephone
service where a shortage of twisted pairs is available.
DS3 (Digital Service Level 3)
44.736Mb/s. A DS3 is a circuit that is provided to customers by telephone
companies. It is a transport for 28 T1 circuits, which adds up to 672 DS0
circuits (voice channels). Telecommunications customers use DS3 circuits as
private lines to connect data devices from one geographical place to another
or to transport large amounts of dial tone to the premises. DS3 circuits are
also used to connect directly to a long-distance company for broadband WAN
service. Telecommunications companies also use DS3 circuits to provide more
telephone service where a shortage of twisted pairs is in their cable plant.
Sometimes it is less expensive for a telephone company to install the DS3
electronics in areas, rather than long feeds of large twisted copper-pair
cables."
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
John Hardman
Sent: Wednesday, December 27, 2000 8:18 PM
To: [EMAIL PROTECTED]
Subject: Re: T3 and Ds3
Hi
Yep terminology, typically T1, T3 in the telco world imply the capabillity
to carry voice and/or data. DS1, DS3 are typically used to refer to data
only lines.
HTH
--
John Hardman CCNP MCSE+I
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