Re: T3 and Ds3
Although often used interchangably, and rightly so, technically DS-3 or Digital Signal-3 is different than T-3 or T-Carrier-3. A DS-3 channel is comprised of seven DS-2 channels, which is comprised of four DS-1s, which is 24 DS-0sso. DS-0 = 64K x24 = DS-1 = 1.536M (1.544M w/T-carrier overhead) x2 = DS-2 = 3.072M (3.152M w/T-carrier overhead) x7 = DS-3 = 43.008M (44.736M w/T-carrier overhead) There is also a DS-1C, which is two DS-1s, but this is rarely seen anymore. In fact, These values are dependant on the Mux hierarchy of telco's T-carrier Mux networks, the strict sense of this terminology being largely obsolete, depending on how new thier stuff is. Hense DS-3 and T-3 being used interchangably. Cheers, Lance From: "nsamuel" [EMAIL PROTECTED] Reply-To: "nsamuel" [EMAIL PROTECTED] To: "Cisco Group Study" [EMAIL PROTECTED] Subject: T3 and Ds3 Date: Wed, 27 Dec 2000 17:55:24 -0500 Is there a difference in a T3 and DS3, or is this just termilogy? Nigel _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ Get your FREE download of MSN Explorer at http://explorer.msn.com _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: T3 and Ds3
Although often used interchangably, and rightly so, technically DS-3 or Digital Signal-3 is different than T-3 or T-Carrier-3. A DS-3 channel is comprised of seven DS-2 channels, which is comprised of four DS-1s, which is 24 DS-0sso. DS-0 = 64K x24 = DS-1 = 1.536M (1.544M w/T-carrier overhead) x2 = DS-2 = 3.072M (3.152M w/T-carrier overhead) x7 = DS-3 = 43.008M (44.736M w/T-carrier overhead) There is also a DS-1C, which is two DS-1s, but this is rarely seen anymore. In fact, These values are dependant on the Mux hierarchy of telco's T-carrier Mux networks, the strict sense of this terminology being largely obsolete, depending on how new thier stuff is. Hense DS-3 and T-3 being used interchangably. Cheers, Lance From: "nsamuel" [EMAIL PROTECTED] Reply-To: "nsamuel" [EMAIL PROTECTED] To: "Cisco Group Study" [EMAIL PROTECTED] Subject: T3 and Ds3 Date: Wed, 27 Dec 2000 17:55:24 -0500 Is there a difference in a T3 and DS3, or is this just termilogy? Nigel _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ Get your FREE download of MSN Explorer at http://explorer.msn.com _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
T3 and Ds3
Is there a difference in a T3 and DS3, or is this just termilogy? Nigel _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: T3 and Ds3
Just terminology...no difference. ""nsamuel"" [EMAIL PROTECTED] wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... Is there a difference in a T3 and DS3, or is this just termilogy? Nigel _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
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 ""nsamuel"" [EMAIL PROTECTED] wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... Is there a difference in a T3 and DS3, or is this just termilogy? Nigel _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: T3 and Ds3
a T1 is a DS1 over copper. same with T3/DS3 other than that, no distinction. -hamlet On Wed, 27 Dec 2000, John Hardman wrote: 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 ""nsamuel"" [EMAIL PROTECTED] wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... Is there a difference in a T3 and DS3, or is this just termilogy? Nigel _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
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 _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: T3 and Ds3
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 _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
