>At 8:30 AM -0600 11/19/2008, lampbay wrote:
>>I've been using the Apple USB modems with a slow dialup line and the
>>best I get is 26400 - usually 24000.
>
>Ok.  So your initial carrier speed is low.  But then to what speed
>does it later retrain?  IF the usable carrier remains that slow, over
>a V.90 dial-up, then you have telephone line noise problems.  You
>should fix that.
>
>>With all the money the government is printing for investment firms,
>>banks, insurance companies and maybe auto manufacturers, why don't
>>they provide fiber optic delivery of HDTV, telephone, radio and
>>Internet service to every home?
>
>If you can get xDSL over 200 Kbps then it's already done.  (200 Kbps
>is the FCC's baseline criteria for "broadband".  Yes, it's so low
>it's made us a world-wide joke.)  Besides getting basic phone
>services to most rural areas, that's what the Universal Services Fund
>did.  Of course, that massive fund has now been dumped into the
>general fund, so it vanished in a puff of national debt.  These days,
>it's being used to wire schools.
>
>- Dan.
>--
>- Psychoceramic Emeritus; South Jersey, USA, Earth


One limitation I have not seen mentioned recently is the practice of 
some TelComs of doubling their subscribers in remote rural areas by 
Pair Gaining the existing Copper Pairs that service the remote areas.

In my former home in Central California, 35 miles of cable from the 
nearest CO, the TelCom pair gained the existing  T-1 effectively 
making 2X T-1 out of the existing T-1. In the process they reduced 
the 56K internet service to 24K.

The Pair Gain is accomplished by time sharing the incoming T-1 line 
to provide 2 out going lines. This requires A-D conversion that 
reduces the available Bandwidth for the two outgoing lines.

When I complained they just said they only guaranteed noise free 
Voice communication.

The service was clamped at 24K during most hours of the day.  I could 
achieve download speeds of near 1000K for the first few seconds until 
the clamp was activated. This was most noticeable at around 3 AM when 
the other, about 100 phones, more normal people were sleeping.

I did find out that Twisted Pair Copper would support 1000K downloads 
when there was no repeaters or shunts in the phone line run and if 
the the line was quiet.

That 1000K was as reported by the Test site. I used iCab set to not 
display Images to download a 1+M Image of a Sea Turtle. The site then 
calculated the Time to complete the download. It would seem the Modem 
must have had a large Buffer.

Apple at one time had a small app for download that would allow the 
user to easily modify the Phone Script. I played with it in a vain 
attempt to increase my download speed before I discovered the Pair 
Gain dodge the TelCom was using.

I used an External Modem given to me by a PC friend that claimed it 
had some special computer inside the box. I think I still have all 
that stuff amongst my treasures. As I recall it was marked as a 33.6K 
Modem but in reality, when properly scripted, it had no limit I ever 
found.

I was using an Umax S-900 233M Mac OS 8.1, 9.1 and 9.2.2

"What a difference a DSL line makes" and MacX.

ErnieG

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