ADSL distance
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Posted by Vic Dura on September 29, 2005, 6:10 am
Please log in for more thread options I'm confused about how the ADSL distance works. I've read of different distance limitations ranging from 6000 to 18000 feet depending on service provider, lines, etc. Most of what I've read indicates that the distance limitation is measured from the "central office". What is that? Is it the building located in various neighborhoods or small towns that service the area within several miles? If so, how do these "small stations" (about the size of two large home refrigerators) that are installed on small concrete pads when DSL is brought to a specific bunch of homes, affect the distance limitation? What is the function of these "small stations"? What are they called? Thanks for any information. -- Shoals Environmental Alliance - Rogersville S.I.G. http://www.shoalsenvironalliance.netfirms.com/ERM/ERM1.htm | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Posted by David Ross on September 29, 2005, 8:11 am
Please log in for more thread options The distance that really counts is the length of the wire from the stations you mentioned above. The smaller outlying units are called various things by various companies. But they are all smaller versions of a CO. Some are underground vaults. Others are small pods on the side of the road. DSL as a technology works out to about 18,000 feet. But in practice there are a variety of reasons that you'll not make it at that distance. And even if you do the speed is minimal. So various companies limit you to distance based on how far the marketing and engineering departments want to stretch things. The shorter they support the cheaper the support costs. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Posted by Vic Dura on September 29, 2005, 8:46 am
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On Thu, 29 Sep 2005 08:11:53 -0400, David Ross >The distance that really counts is the length of the wire from the
>stations you mentioned above. The smaller outlying units are called >various things by various companies. But they are all smaller versions >of a CO. Some are underground vaults. Others are small pods on the side >of the road. > >DSL as a technology works out to about 18,000 feet. So that wire-distance would be measured from the nearest "pod" rather than the central office which could be much farther away? Could these pods be strung out in series to extend the distance from the CO? e.g. CO <==> Pod1 <==> Pod2 <==> Pod2 <==> Residence
Does anybody know a more technical name for these "pods"? -- Shoals Environmental Alliance - Rogersville S.I.G. http://www.shoalsenvironalliance.netfirms.com/ERM/ERM1.htm | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Posted by Robert Redelmeier on September 29, 2005, 3:01 pm
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> On Thu, 29 Sep 2005 08:11:53 -0400, David Ross
>>The distance that really counts is the length of the wire
>>from the stations you mentioned above. The smaller outlying >>units are called various things by various companies. But >>they are all smaller versions of a CO. Some are underground >>vaults. Others are small pods on the side of the road. >>DSL as a technology works out to about 18,000 feet.
>
> So that wire-distance would be measured from the nearest "pod" > rather than the central office which could be much farther away? > Could these pods be strung out in series to extend the
> distance from the CO? e.g. > CO <==> Pod1 <==> Pod2 <==> Pod2 <==> Residence
> Does anybody know a more technical name for these "pods"?
The usual name is RT (Remote Terminal). They contain active electronics and are usually serviced by fiber to the CO. Often are small huts or prefab buildings 8x9x20ft. Contrast with "pedestals" which do not contain powered electronics (maybe load coils) and are glorified junction boxes. -- Robert | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Posted by Vic Dura on September 29, 2005, 3:04 pm
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On Thu, 29 Sep 2005 15:01:51 GMT, Robert Redelmeier >> On Thu, 29 Sep 2005 08:11:53 -0400, David Ross
>>>The distance that really counts is the length of the wire
>>>from the stations you mentioned above. The smaller outlying >>>units are called various things by various companies. But >>>they are all smaller versions of a CO. Some are underground >>>vaults. Others are small pods on the side of the road. >
>>>DSL as a technology works out to about 18,000 feet.
>>
>> So that wire-distance would be measured from the nearest "pod" >> rather than the central office which could be much farther away? >
>> Could these pods be strung out in series to extend the
>> distance from the CO? e.g. >
>> CO <==> Pod1 <==> Pod2 <==> Pod2 <==> Residence
>
>> Does anybody know a more technical name for these "pods"?
>
>The usual name is RT (Remote Terminal). They contain active >electronics and are usually serviced by fiber to the CO. >Often are small huts or prefab buildings 8x9x20ft. > >Contrast with "pedestals" which do not contain powered >electronics (maybe load coils) and are glorified junction >boxes. This "pods" I'm seeing seem like they may be mini versions of an RT. They are metal cabinets that are 4' deep x 8' wide x 6' high. Metal doors in the front and sides with 220v electrical power with meter. The cabinets are power ventilated. You can hear the fans running when you stand next to them. -- Shoals Environmental Alliance - Rogersville S.I.G. http://www.shoalsenvironalliance.netfirms.com/ERM/ERM1.htm | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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> distance limitations ranging from 6000 to 18000 feet depending on
> service provider, lines, etc.
>
> Most of what I've read indicates that the distance limitation is
> measured from the "central office". What is that? Is it the building
> located in various neighborhoods or small towns that service the area
> within several miles?
>
> If so, how do these "small stations" (about the size of two large home
> refrigerators) that are installed on small concrete pads when DSL is
> brought to a specific bunch of homes, affect the distance limitation?
> What is the function of these "small stations"? What are they called?