Use the upstream measurement. A broadband package's large download figure is not the upload capacity. Start with the usable upload speed, convert the units and leave room for other traffic.

Measure a realistic connection

Record a representative upstream result while other large transfers are quiet. Use the network you intend to keep using: a Wi-Fi connection, mobile hotspot and wired link may behave differently. If several people share the connection, reserve capacity for their work too.

Keep a note of the measurement, current eMule values and time of the test. That gives you a baseline to return to when an adjustment makes browsing worse. One short result is a starting observation, not proof of a permanent line speed.

Convert bits to bytes before entering a value

Mbps means megabits per second. Divide by eight to obtain decimal megabytes per second. Decimal kB/s is Mbps multiplied by 125; binary KiB/s is Mbps multiplied by approximately 122.07. Check the client's displayed units, particularly when comparing different *Mule builds or older help pages.

Arithmetic examples, rounded: the 80% column is an illustration, not a universal prescription
Measured upstreamApprox. capacity in KiB/s80% of that capacity
10 Mbps1,221977 KiB/s
20 Mbps2,4411,953 KiB/s
50 Mbps6,1044,883 KiB/s
100 Mbps12,2079,766 KiB/s

For example, entering 20 into a byte-rate field because the line uploads at 20 Mbps would confuse two very different quantities. Conversely, copying the headline downstream figure into the upload limit can overwhelm the actual upstream path.

Keep capacity and limit separate

Capacity describes the connection; the limit is how much the application may use. The project's connection help uses roughly 80% of upload capacity as a starting point for leaving headroom. Your working value may need to be lower when other devices, calls or backups share the link.

Do not set everything unlimited merely because the line is fast. Downloads also need outbound control traffic, and a busy upstream can interfere with ordinary browsing. Equally, an extremely small limit is not a reliable way to improve your own downloads.

Change one setting and observe ordinary use

  1. Write down the current upload limit.
  2. Choose a conservative value based on usable upstream capacity.
  3. Let transfers settle and try an ordinary webpage or call.
  4. Reduce the limit if the shared connection becomes unresponsive.
  5. Keep the working value and compare again at a busy time.

Do not change port mappings, source limits and bandwidth together during this test. If the result improves, you want to know which change caused it.

Understand Upload Speed Sense

USS is eMule's mechanism for adjusting upload using observed latency. Review the options in your build and start with its documented defaults instead of copying aggressive ping values from an old guide. It aims to adapt to conditions; it cannot promise that every other application will always remain unaffected.

Know when the limit is not the problem

A healthy upload setting cannot provide an unavailable file part or bypass a remote queue. If one transfer waits while others work, inspect its sources. If many sources say Too many connections, use the connection-load checklist. For general waiting states, see credits and queues.

Sources and further reading

Some project help includes historical interface examples. Match the instructions to your installed build.