Here is a calculation from an external source about what you can
do with certain line speeds.
File size
Modem
56Kb/s
ISDN
128Kb/s
ADSL
512Kb/2
ADSL
1024Kb/s
ADSL
2048Kb/s
ADSL
2-8Mb/s
All durations are in seconds, unless stated otherwise.
2 Mb
± 300
± 120
± 32
± 16
± 8
± 2
4 Mb
± 600
± 240
± 64
± 32
± 16
± 4
8 Mb
± 1.200
± 480
± 128
± 64
± 32
± 8
30 Mb
± 4.680
± 1.920
± 480
± 240
± 120
± 30
50 Mb
± 7.860
± 3.180
± 800
± 400
± 200
± 50
All values and speeds in this table are theoretically
obtainable speeds and values. External factors can influence
these. This table is only to be used as an indication and you
can never make claims against it or use it in any other way,
apart from a theoretical indication.