Broadband - technical possibilities of odd speeds.

Is there anything in the modem at my end, or the exchange that stops
it being able to negotiate for a speed of 768K, 1278K, ...?
Basically if my line won't support 2Mb, is there a reason why it wouldn't
work at 1.5, or 1.75?

"Ian Stirling" <(E-Mail Removed)> wrote in message
news:4212875b$0$53463$(E-Mail Removed)...
> Is there anything in the modem at my end, or the exchange that stops
> it being able to negotiate for a speed of 768K, 1278K, ...?
> Basically if my line won't support 2Mb, is there a reason why it wouldn't
> work at 1.5, or 1.75?

Yes, The speed is controlled by the exchange DSLAM equipment. You have no
control over it.

Phill

On 15 Feb 2005 23:35:55 GMT, Ian Stirling <(E-Mail Removed)>
wrote:

>Is there anything in the modem at my end, or the exchange that stops
>it being able to negotiate for a speed of 768K, 1278K, ...?
>Basically if my line won't support 2Mb, is there a reason why it wouldn't
>work at 1.5, or 1.75?

Well, that *was* the basis for RADSL (Rate Adaptive DSL) - negotiate
the best speed based on the physical line limitations.

Don't know how far that got in the UK.

Jake

P H <(E-Mail Removed)> wrote:
>
> "Ian Stirling" <(E-Mail Removed)> wrote in message
> news:4212875b$0$53463$(E-Mail Removed)...
>> Is there anything in the modem at my end, or the exchange that stops
>> it being able to negotiate for a speed of 768K, 1278K, ...?
>> Basically if my line won't support 2Mb, is there a reason why it wouldn't
>> work at 1.5, or 1.75?
>
> Yes, The speed is controlled by the exchange DSLAM equipment. You have no
> control over it.

So, might this be a cure for some of us with intermittent lines - they'd
just renegotiate back to 256K/... ?

> >Is there anything in the modem at my end, or the exchange that stops
> >it being able to negotiate for a speed of 768K, 1278K, ...?
> >Basically if my line won't support 2Mb, is there a reason why it wouldn't
> >work at 1.5, or 1.75?
>
> Well, that *was* the basis for RADSL (Rate Adaptive DSL) - negotiate
> the best speed based on the physical line limitations.
>
Not quite - IIRC RADSL only adapts the upload speed.

On Wed, 16 Feb 2005 12:13:34 GMT, "phantom"
<(E-Mail Removed)> wrote:

>> >Is there anything in the modem at my end, or the exchange that stops
>> >it being able to negotiate for a speed of 768K, 1278K, ...?
>> >Basically if my line won't support 2Mb, is there a reason why it wouldn't
>> >work at 1.5, or 1.75?
>>
>> Well, that *was* the basis for RADSL (Rate Adaptive DSL) - negotiate
>> the best speed based on the physical line limitations.
>>
>Not quite - IIRC RADSL only adapts the upload speed.
>
Was it? My memory's hazy.

"Ian Stirling" <(E-Mail Removed)> wrote in message
news:421337ff$0$22907$(E-Mail Removed)...
>P H <(E-Mail Removed)> wrote:
>>
>> "Ian Stirling" <(E-Mail Removed)> wrote in message
>> news:4212875b$0$53463$(E-Mail Removed)...
>>> Is there anything in the modem at my end, or the exchange that stops
>>> it being able to negotiate for a speed of 768K, 1278K, ...?
>>> Basically if my line won't support 2Mb, is there a reason why it
>>> wouldn't
>>> work at 1.5, or 1.75?
>>
>> Yes, The speed is controlled by the exchange DSLAM equipment. You have no
>> control over it.
>
> So, might this be a cure for some of us with intermittent lines - they'd
> just renegotiate back to 256K/... ?

Yes, Posible but has to be agreed between your SP and BTW. There isn't an
auto retraining of speed, you only get the agreed speed (at this time), but
this may change when DSL Max arrives later in the year.

Phill

P H <(E-Mail Removed)> wrote:
>
> "Ian Stirling" <(E-Mail Removed)> wrote in message
> news:421337ff$0$22907$(E-Mail Removed)...
>>P H <(E-Mail Removed)> wrote:
>>>
>>> "Ian Stirling" <(E-Mail Removed)> wrote in message
>>> news:4212875b$0$53463$(E-Mail Removed)...
>>>> Is there anything in the modem at my end, or the exchange that stops
>>>> it being able to negotiate for a speed of 768K, 1278K, ...?
>>>> Basically if my line won't support 2Mb, is there a reason why it
>>>> wouldn't
>>>> work at 1.5, or 1.75?
>>>
>>> Yes, The speed is controlled by the exchange DSLAM equipment. You have no
>>> control over it.
>>
>> So, might this be a cure for some of us with intermittent lines - they'd
>> just renegotiate back to 256K/... ?
>
> Yes, Posible but has to be agreed between your SP and BTW. There isn't an
> auto retraining of speed, you only get the agreed speed (at this time), but
> this may change when DSL Max arrives later in the year.

Doh.
Sorry, managed to confuse two threads I was posting in.
Oops.