Advice please regarding leased lines.
JLowe
I currently have 2 meg ADSL and I am considering upgrading to a leased
line..
At the moment I am a little confused by all this and it would be great if
some of you guys on here could help out..
1) What are the main advantages of a leased line I know its a 1:1 ration
compared to 20:1 for ADSL
2) Would a 2 meg leased line be faster than a 2 Meg ADSL line?
3) is the upload on a 2 meg DSL line the same as the downstream 250kbps ??
4) Who do I need to contact and are there any restrictions on where you can
have a leased line installed?
5) How does a leased line connect to my PC Network?
Sorry for all the questions but I am seriously considering this and welcome
any feedback
Cheers James
Chris
"JLowe" <ja...@xr3i.info> wrote in message
news:v9ycnRg7o4l...@giganews.com...
> Hi all wonder if anyone can point me in the right direction.
>
> I currently have 2 meg ADSL and I am considering upgrading to a leased
> line..
>
> At the moment I am a little confused by all this and it would be great if
> some of you guys on here could help out..
>
> 1) What are the main advantages of a leased line I know its a 1:1 ration
> compared to 20:1 for ADSL
Like you said, no contention. Permanant, symmetric, 1:1 .... but much more
expensive!!
> 2) Would a 2 meg leased line be faster than a 2 Meg ADSL line?
2 Meg is 2 Meg no matter what the delivery method, leased line, ADSL, wet
string ... doesn't matter. It's just 2 Meg. It amazes me when our ISDN (64K)
customers go to a 64K leased line and then are supprised when it's not any
faster. What do they expect? Bandwidth is bandwidth, regardless of how it's
delivered.
> 3) is the upload on a 2 meg DSL line the same as the downstream 250kbps ??
Eh? on 2Meg xDSL the upload is 256K. On leased line the upload is the same
as the download so a 2Meg leased line will also be 2Meg upload. It's
symmetric, not asymetric.
> 4) Who do I need to contact and are there any restrictions on where you
can
> have a leased line installed?
An ISP would be a good place to start. There shouldn't be any restrictions
but it depends on how the 2 Meg is delivered, ie. if it needs to go on fibre
is there fibre to the building. If not then how long is the dig from your
building to the local exchange?
> 5) How does a leased line connect to my PC Network?
Depends! We have an X.21 presentation on the NTE which connects to a Cisco
routers serial port via an X.21 cable, then it's just ethernet out to the
firewall/proxy server.
> Sorry for all the questions but I am seriously considering this and
welcome
> any feedback
Pleasure!
> Cheers James
>
>
>
Tim Clark
"Chris" <Ch...@nospam.com> writes:
>
> "JLowe" <ja...@xr3i.info> wrote in message
> news:v9ycnRg7o4l...@giganews.com...
>> line..
>>
>> compared to 20:1 for ADSL
>
> Like you said, no contention. Permanant, symmetric, 1:1 .... but much more
> expensive!!
True, but what is often ignored is contention beyond access to the ISP -
such as the contention involved in the ISP's connection to the rest of
the Internet. Consider this case: a hypothetical ISP has 200 customers
each connected by a 2 Mbps leased line, all delighted to be enjoying 1:1
contention on their lines. However, they might be less than pleased to
learn their ISP has only 8 Mbps of bandwidth to the rest of the Internet
- effectively they're now bottlenecked by a 50:1 contention ratio there.
Being overly concerned about ADSL contention ratio is rather like
car drivers worried only about the traffic in the road they live on.
Sure if there are jams there, it will always affect you, but your
journey is likely to be affected by conjestion issues in other parts
of the network which the journey takes you through.
Tim Clark
Martin
Our company had a leased line from Wam!Net up to February this year -
it was 256k burstable to 2M, which meant that we paid for a regular 256k
service but had the possibility of going to the max. line speed for a
certain free quota per month. Any use above the quota would be charged,
however we never went over and here we're talking about a company with
no restraints on up/download and which was involved pretty heavily with
video streaming across the Internet .
Equipment was a BT box on the wall, plus 2U of 'stuff' (router and
'thing'), what came out of that was plain old Ethernet.
The system still went slow at times, possibly because Wam!Net work with
a lot of video houses and hires out render-farm time to them, but it was
bloody fast nearly all the time and I so miss not having it to hand.
Nowadays I would probably spec. an ADSL line but in our case we needed a
decent upload performance and ADSL wasn't an option two years ago.
My warning is that a leased line is expensive, and you probably don''t
need it unless you must have the upload speed.
Oh, it's probably still down to BT for install and they always seem to
take 2-3 months. If you're in Central London it might take longer
because the wire conduits are choked to capacity.
In article <v9ycnRg7o4l...@giganews.com>, JLowe
<ja...@xr3i.info> writes
--
Martin @ Strawberry Hill
beenie
its rather pricy though... £0000s a month...