| Author |
Message |
Vic Dura
Guest
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 Posted:
Thu Sep 29, 2005 4:10 pm Post subject:
ADSL distance |
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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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Robert Redelmeier
Guest
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| Posted:
Thu Sep 29, 2005 4:20 pm Post subject:
Re: ADSL distance |
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Vic Dura <vpdura@hiwaay.net> wrote:
| Quote: | On Thu, 29 Sep 2005 08:11:53 -0400, David Ross
news11@raleighthings.com> wrote Re Re: ADSL distance:
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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Vic Dura
Guest
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| Posted:
Thu Sep 29, 2005 4:20 pm Post subject:
Re: ADSL distance |
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On Thu, 29 Sep 2005 08:11:53 -0400, David Ross
<news11@raleighthings.com> wrote Re Re: ADSL distance:
| Quote: | 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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David Ross
Guest
|
| Posted:
Thu Sep 29, 2005 4:20 pm Post subject:
Re: ADSL distance |
|
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| Quote: | 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?
|
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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Vic Dura
Guest
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| Posted:
Fri Sep 30, 2005 1:04 am Post subject:
Re: ADSL distance |
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On Thu, 29 Sep 2005 15:01:51 GMT, Robert Redelmeier
<redelm@ev1.net.invalid> wrote Re Re: ADSL distance:
| Quote: | Vic Dura <vpdura@hiwaay.net> wrote:
On Thu, 29 Sep 2005 08:11:53 -0400, David Ross
news11@raleighthings.com> wrote Re Re: ADSL distance:
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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dj
Guest
|
| Posted:
Fri Sep 30, 2005 2:46 am Post subject:
Re: ADSL distance |
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Vic Dura wrote:
| Quote: | On Thu, 29 Sep 2005 15:01:51 GMT, Robert Redelmeier
redelm@ev1.net.invalid> wrote Re Re: ADSL distance:
Vic Dura <vpdura@hiwaay.net> wrote:
On Thu, 29 Sep 2005 08:11:53 -0400, David Ross
news11@raleighthings.com> wrote Re Re: ADSL distance:
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.
|
In my neighborhood, the RT ("SLC2000" or "switch box" -- Verizon
terminology) is right next to another box they call a "DSLAM" (for
DSL Access Multiplexor). The ILECs seem to have made separate
cabinets so that if the CLECs are given access to the RT, they
still won't have to share. From your description, you could be
looking at an RT or a DSLAM.
dj |
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Vic Dura
Guest
|
| Posted:
Fri Sep 30, 2005 4:56 am Post subject:
Re: ADSL distance |
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On Thu, 29 Sep 2005 16:46:24 -0500, dj <danaxx@xxzdana.net> wrote Re
Re: ADSL distance:
| Quote: | 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.
In my neighborhood, the RT ("SLC2000" or "switch box" -- Verizon
terminology) is right next to another box they call a "DSLAM" (for
DSL Access Multiplexor). The ILECs seem to have made separate
cabinets so that if the CLECs are given access to the RT, they
still won't have to share. From your description, you could be
looking at an RT or a DSLAM.
|
Thanks for the comments.
Can DSLAMs be "chained" in series to extend DSL out further distances?
--
Shoals Environmental Alliance - Rogersville S.I.G.
http://www.shoalsenvironalliance.netfirms.com/ERM/ERM1.htm |
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David Schwartz
Guest
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| Posted:
Fri Sep 30, 2005 6:19 am Post subject:
Re: ADSL distance |
|
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"Vic Dura" <vpdura@hiwaay.net> wrote in message
news:jnvoj1pnnig24055h79n35clfb30omff1k@4ax.com...
| Quote: | Thanks for the comments.
Can DSLAMs be "chained" in series to extend DSL out further distances?
|
There's no reason since there's no special distance limit between the
DSLAM and the CO. (The DSLAM to the CO is almost always fiber.)
DS |
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Robert Redelmeier
Guest
|
| Posted:
Fri Sep 30, 2005 7:21 am Post subject:
Re: ADSL distance |
|
|
David Schwartz <davids@webmaster.com> wrote:
| Quote: |
"Vic Dura" <vpdura@hiwaay.net> wrote in message
Can DSLAMs be "chained" in series to extend DSL out further distances?
There's no reason since there's no special distance limit between the
DSLAM and the CO. (The DSLAM to the CO is almost always fiber.)
|
And adding to this, IIRC telco-grade fiber can go ~90 miles without
repeaters. I think some of the transoceanics can go further.
They often have to use attenuators to avoid overpowering receivers
on short runs. And goggles while working is a must!
-- Robert |
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Vic Dura
Guest
|
| Posted:
Fri Sep 30, 2005 4:04 pm Post subject:
Re: ADSL distance |
|
|
On Thu, 29 Sep 2005 18:19:27 -0700, "David Schwartz"
<davids@webmaster.com> wrote Re Re: ADSL distance:
| Quote: |
"Vic Dura" <vpdura@hiwaay.net> wrote in message
news:jnvoj1pnnig24055h79n35clfb30omff1k@4ax.com...
Thanks for the comments.
Can DSLAMs be "chained" in series to extend DSL out further distances?
There's no reason since there's no special distance limit between the
DSLAM and the CO. (The DSLAM to the CO is almost always fiber.)
|
I was wondering as a question of logistics. Suppose you have:
CO <==> DSLAM1 and a NewLocation not currently served by DSL
Where NewLocation is further from CO than DSLAM1 i.e. "down the road"
from DSLAM1. Would it be more desirable to run a shorter cable from
DSLAM1 to a new DSLAM2 near NewLocation rather than a longer cable
directly from the CO to DSLAM2?
--
Shoals Environmental Alliance - Rogersville S.I.G.
http://www.shoalsenvironalliance.netfirms.com/ERM/ERM1.htm |
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David Ross
Guest
|
| Posted:
Fri Sep 30, 2005 10:19 pm Post subject:
Re: ADSL distance |
|
|
| Quote: | 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.
Although I've seen some around here that are the size of a dorm fridge |
with a power meter attached. |
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David Ross
Guest
|
| Posted:
Fri Sep 30, 2005 10:23 pm Post subject:
Re: ADSL distance |
|
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| Quote: | I was wondering as a question of logistics. Suppose you have:
CO <==> DSLAM1 and a NewLocation not currently served by DSL
Where NewLocation is further from CO than DSLAM1 i.e. "down the road"
from DSLAM1. Would it be more desirable to run a shorter cable from
DSLAM1 to a new DSLAM2 near NewLocation rather than a longer cable
directly from the CO to DSLAM2?
|
Maybe for you but not for them. Phone companies HATE to run cable. It's
costs a fortune in labor. So when they do it they run 25, 50, or more
pair bundles down poles or even more if underground. Then they splice
into it in to get it into a house or building. You get whatever is in place.
Of course these splices are why you can some times discover that "line
2" into your house has a dial tone even though you don't have a line 2. |
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David Ross
Guest
|
| Posted:
Fri Sep 30, 2005 10:23 pm Post subject:
Re: ADSL distance |
|
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| Quote: | I was wondering as a question of logistics. Suppose you have:
CO <==> DSLAM1 and a NewLocation not currently served by DSL
Where NewLocation is further from CO than DSLAM1 i.e. "down the road"
from DSLAM1. Would it be more desirable to run a shorter cable from
DSLAM1 to a new DSLAM2 near NewLocation rather than a longer cable
directly from the CO to DSLAM2?
|
Maybe for you but not for them. Phone companies HATE to run cable. It's
costs a fortune in labor. So when they do it they run 25, 50, or more
pair bundles down poles or even more if underground. Then they splice
into it in to get it into a house or building. You get whatever is in place.
Of course these splices are why you can some times discover that "line
2" into your house has a dial tone even though you don't have a line 2. |
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| Back to top |
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evodawg
Guest
|
| Posted:
Tue Oct 18, 2005 6:27 am Post subject:
Re: ADSL distance |
|
|
Vic Dura wrote:
| Quote: | 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.
|
http://bandwidthplace.com/speedtest/
Rich
--
"you can lead them to LINUX
but you can't make them THINK" |
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evodawg
Guest
|
| Posted:
Tue Oct 18, 2005 6:30 am Post subject:
Re: ADSL distance |
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Vic Dura wrote:
| Quote: | 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.
|
They're called POWER SUPPLIES.
Rich
--
"you can lead them to LINUX
but you can't make them THINK" |
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