ADSL - SDSL
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Gerant at Netdefinition SARL
13 February 2001 15:27pm
What's the difference? Is there any?
Managing Director at Steelside
13 February 2001 17:59pm
Sam,
The "A" stands for Asymmetric, the "S" for Symmetric. [The "DSL" for Digital Subscriber Line]
ADSL is quickly becoming the most popular form of DSL technology. ADSL supports up to 8 Mbps bandwidth for downloading and up to 1 Mbps for uploading. The asymmetrical nature of ADSL technology makes it ideal for Internet/Intranet surfing, video-on-demand, and remote local area network (LAN) access. Users of ADSL typically download more information than they send.
SDSL delivers high-speed data networking over a single-pair of copper phone lines, at the same speed in both the upstream and downstream directions. Speed ranges from 160 Kbps up to 1.544 Mbps at a maximum range of 15,000 feet (about 2.8 miles). SDSL is ideal for business applications that require identical downstream and upstream speeds such as video conferencing or collaborative computing as well as similar applications appropriate for ADSL technology.
Now, if you were a boarder (and not a skier who actually spends most of his slope-time in dingy Chamonix bars) you would have known the difference.
Director at Skywire
14 February 2001 11:36am
A quick additional. Don't use ADSL for email, especially in a corporate environment.
The Asymmetric nature of the line means that although you can download email fine, sending out is slow and non-effective. I would instead use an E1.
However, for web browsing and mp3 downloading where the traffic is strongly one way (down) it's ideal. I would imagine this works equally well for video over IP services (Homechoice being case and point)
On 17:59:55 13 February 2001 murray wrote:
>Sam,
>
>The "A" stands for Asymmetric, the "S"
>for Symmetric. [The "DSL" for Digital Subscriber
>Line]
>
>ADSL is quickly becoming the most popular form of DSL
>technology. ADSL supports up to 8 Mbps bandwidth for
>downloading and up to 1 Mbps for uploading. The
>asymmetrical nature of ADSL technology makes it ideal for
>Internet/Intranet surfing, video-on-demand, and remote
>local area network (LAN) access. Users of ADSL typically
>download more information than they send.
>
>SDSL delivers high-speed data networking over a
>single-pair of copper phone lines, at the same speed in
>both the upstream and downstream directions. Speed ranges
>from 160 Kbps up to 1.544 Mbps at a maximum range of
>15,000 feet (about 2.8 miles). SDSL is ideal for business
>applications that require identical downstream and
>upstream speeds such as video conferencing or
>collaborative computing as well as similar applications
>appropriate for ADSL technology.
>
>Now, if you were a boarder (and not a skier who actually
>spends most of his slope-time in dingy Chamonix bars) you
>would have known the difference.
Gerant at Netdefinition SARL
14 February 2001 11:43am
What's an 'E1'? A leased line?
On 11:36:46 14 February 2001 Alex wrote:
>A quick additional. Don't use ADSL for email, especially
>in a corporate environment.
>
>The Asymmetric nature of the line means that although you
>can download email fine, sending out is slow and
>non-effective. I would instead use an E1.
>
>However, for web browsing and mp3 downloading where the
>traffic is strongly one way (down) it's ideal. I would
>imagine this works equally well for video over IP services
>(Homechoice being case and point)
>
>On 17:59:55 13 February 2001 murray wrote:
>>Sam,
>>
>>The "A" stands for Asymmetric, the
>"S"
>>for Symmetric. [The "DSL" for Digital
>Subscriber
>>Line]
>>
>>ADSL is quickly becoming the most popular form of DSL
>>technology. ADSL supports up to 8 Mbps bandwidth for
>>downloading and up to 1 Mbps for uploading. The
>>asymmetrical nature of ADSL technology makes it ideal
>for
>>Internet/Intranet surfing, video-on-demand, and remote
>>local area network (LAN) access. Users of ADSL
>typically
>>download more information than they send.
>>
>>SDSL delivers high-speed data networking over a
>>single-pair of copper phone lines, at the same speed
>in
>>both the upstream and downstream directions. Speed
>ranges
>>from 160 Kbps up to 1.544 Mbps at a maximum range of
>>15,000 feet (about 2.8 miles). SDSL is ideal for
>business
>>applications that require identical downstream and
>>upstream speeds such as video conferencing or
>>collaborative computing as well as similar
>applications
>>appropriate for ADSL technology.
>>
>>Now, if you were a boarder (and not a skier who
>actually
>>spends most of his slope-time in dingy Chamonix bars)
>you
>>would have known the difference.
Director at Skywire
14 February 2001 12:55pm
E1 is the Euro version of a T1. E1 is 30 ISDN lines plus a data line, where as (if my memory serves me correct) 23 ISDN lines plus a data line.
More detailed info : "The E1 signal format carries data at a rate of 2.048 million bits per second and can carry 32 channels of 64 Kbps* each. E1 carries at a somewhat higher data rate than T-1 (which carries 1.544 million bits per second) because, unlike T-1, it does not do bit-robbing and all eight bits per channel are used to code the signal. E1 and T-1 can be interconnected for international use."
On 11:43:23 14 February 2001 Sam wrote:
>What's an 'E1'? A leased line?
na at ta
20 December 2006 07:27am
A good place to learn about T1 is wikipedia. Theres a tremendous amount you could learn. Has anyone noticed how much cheaper a T1 line is? I didn't know about the euro version. Good post.