speed

[verdyp]

Speeds are set up according to your maximum effective download bandwidth:
- modem/ISDN : 56 to 128 kbit/s
- cable/DSL: 350 to 999 kbit/s
- T1: 1 Mbit/s to 2.9 Mbit/s
- T3: 3 Mbit/s or more
- Ethernet: not limited.

Then the upload speed is setup with a slider as a percentage of this value. The slowest setting is 25%, the fastest is 100%.
So the slowest settings for uploads is:
- modem/ISDN: 24 kbit/s
- cable/DSL: 87 kbit/s
- T1: 256 kbit/s
- T3: 750 kbit/s
- Ethernet: not limited

And the (default) fasted settings for uploads is:
- modem/ISDN : 56 kbit/s
- cable/DSL: 350 kbit/s
- T1: 1 Mbit/s Mbit/s
- T3: 3 Mbit/s
- Ethernet: not limited

On a ADSL (assymetric) connection, you may need to reduce the upload speed to keep your performance. The ideal upload speed to set is at about 85% of your maximum theorical upload speed.

For example with a 1024/128k ADSL access, you would choose:
- download speed: cable/DSL = 350 to 999 kbit/s
- upload speed: limit at 31% = 108.5 kbit/s (85% of 350)
(as the slider goes from 25% to 100%, the position for 31% is around 1/4 of the visible width of the slider)

Generally, for most cable accesses, you will need to reduce the max upload speed as well if your upload bandwidth is shared despite such access is most often symetric: you can't reach the theorical maximum. This depends on your ISP, but a typical cable access at 1.5 Mbit /s should work well with an upload speed limit around 1Mbit/s (so with the limit at 66%, or the slider will be near the middle of the slidebar).

For symetric and dedicated (bandwidth not shared) accesses (SDSL, T1, T3), you can keep this slider at its maximum)

To help visualize this limit, the slider displays the computed max upload speed.