Options to using SDSL?

Mr. Benn wrote:
> Mark <(E-Mail Removed)> wrote in
> news:(E-Mail Removed):
>
>> On Fri, 22 Jan 2010 16:55:38 -0000, "Mr Benn" <(E-Mail Removed)>
>> wrote:
>>
>>> If I want a 5Mb/s symmetrical uncontended connection to the Internet,
>>> what wired options do I have apart from using multiple SDSL lines?
>>> Assuming I have fibre access, what services are available from the
>>> likes of BT etc?
>>>
>>> The local exchange is 21CN enabled and is just a few hundred metres
>>> away. I'd also like to be able to carry voice traffic over the same
>>> fibre.
>>>
>>> Thanks if anyone can share their knowledge with me.
>>
>> If you already have fibre then first speak to the retail supplier of
>> that service to see what they can do.
>> If it's Openreach fibre and you don't fancy the current retail CP,
>> then through the wonders of novation I believe you can switch to
>> another CP that can sell you an Ethernet-based service based on
>> something like WES10 (BICBW). From an installation charges point of
>> view, that may be cheaper than getting fibre installed from someone
>> else such as COLT, ntlTelewest Business, C&W, Global Crossing etc. But
>> then there's the rental issue, so shop around anyway.
>>
>> If you have fibre, what service is it currently delivering?
>
> Thanks Mark for the information. That's very helpful.
>
> The connection is for a brand new building and I have been led to believe
> that fibre is already installed but currently does not carry any services
> as far as I'm aware. I obviously need to check to see who owns the fibre
> and if it's connected to anything on the far end!
>
> If I understand correctly, If Openreach own the fibre, they are obliged to
> allow other operators access to the fibre in return for a rental fee. Is
> that correct?

More that they will take a sub contract from other operators to deliver
what services are needed via their won terminating kit.. I dont think
they rent 'dark fiber'

Might be wrong. They never used to.



>
> Regards
>
> Mr Benn

Petek wrote:
> 'Mr Benn[_2_ Wrote:
>> ;189039']If I want a 5Mb/s symmetrical uncontended connection to the
>> Internet, what
>> wired options do I have apart from using multiple SDSL lines? Assuming
>> I
>> have fibre access, what services are available from the likes of BT
>> etc?
>>
>> The local exchange is 21CN enabled and is just a few hundred metres
>> away.
>> I'd also like to be able to carry voice traffic over the same fibre.
>>
>> Thanks if anyone can share their knowledge with me.
>
> Two options really, either bonded sdsl (or ADSL(M)) or ethernet.
>
> Price wise, if you are that close to the exchange, around £200 per
> month for bonded ADSL(M) delivering a shade under 5Mb/s with a sensible
> setup fee, or perhaps 5Mb/s on 10Mb/s leased line. Fibre availability
> wise dependent, you are looking at around £490pm for 5 on 10 leased
> line or £550 pm for a full ten, unless you are in/very close to London
> where it is cheaper still.
>
> £17k pa is ridiculous for 5meg, you can have 50 for that money, and
> considerably more for considerably less ££ in and around London.
>

Not for full internet bandwidth it aint.


> We offer both, so feel free to get in touch if you are interested.
>
>

But how congested are your peering links upstream?


>
>

"John Walliker" <(E-Mail Removed)> wrote in message
news:e0c985bf-4d13-486f-a667-(E-Mail Removed)...
> On 23 Jan, 14:10, "Mr. Benn" <%...@invalid.invalid> wrote:
>> > If I want a 5Mb/s symmetrical uncontended connection to the Internet,
>> > what wired options do I have apart from using multiple SDSL lines?
>
> You could use a couple of bonded ADSL2+ annex M lines. I can get
> 2.5Mbit/s uplink (depending on what noise margin I select) at a
> distance of 1km from the exchange using Be + AAISP, so you should be
> able to do better.
>
> Contention on the uplink is unlikely to be significant and the
> downlink will have several times more bandwidth so a modest amount of
> contention will be unlikey to cause a problem.
>
> This solution is likely to be much less expensive than the
> alternatives.
>
> John

It seems I may need closer to 10Mb/s and ethernet over fibre is no more
expensive than bonded SDSL at that data rate and above.

Out of interest, how do you synchronise the two SDSL lines at the boundary
router?

Mr Benn wrote:
> "John Walliker" <(E-Mail Removed)> wrote in message
> news:e0c985bf-4d13-486f-a667-(E-Mail Removed)...
>> On 23 Jan, 14:10, "Mr. Benn" <%...@invalid.invalid> wrote:
>>>> If I want a 5Mb/s symmetrical uncontended connection to the Internet,
>>>> what wired options do I have apart from using multiple SDSL lines?
>> You could use a couple of bonded ADSL2+ annex M lines. I can get
>> 2.5Mbit/s uplink (depending on what noise margin I select) at a
>> distance of 1km from the exchange using Be + AAISP, so you should be
>> able to do better.
>>
>> Contention on the uplink is unlikely to be significant and the
>> downlink will have several times more bandwidth so a modest amount of
>> contention will be unlikey to cause a problem.
>>
>> This solution is likely to be much less expensive than the
>> alternatives.
>>
>> John
>
> It seems I may need closer to 10Mb/s and ethernet over fibre is no more
> expensive than bonded SDSL at that data rate and above.
>
> Out of interest, how do you synchronise the two SDSL lines at the boundary
> router?
>
>
special kit.

depends on at which network layer you are bonding.

Meanwhile, at the uk.telecom.broadband Job Justification Hearings, Mr Benn
chose the tried and tested strategy of:

> Out of interest, how do you synchronise the two SDSL lines at the boundary
> router?

Why would you? ADSL2+ is faster than SDSL, and supports bonding at the DSL
layer, so no need to fanny about with MLPPP, NAT 'load balancing' or
routing.

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