Here is a way to increase the dail-up speed...
Dial up Download speed is low and some time it can be unused foradvanced user so to improve Dial up Download speed following registryediting is helpfull.

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1. Direct in Regedit :

Open:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ Tcpip\Parameters
Edit as follows:

“SackOpts”=dword:00000001
“TcpWindowSize”=dword:0005ae4c
“Tcp1323Opts”=dword:00000003
“DefaultTTL”=dword:00000040
“EnablePMTUBHDetect”=dword:00000000
“EnablePMTUDiscovery”=dword:00000001
“GlobalMaxTcpWindowSize”=dword:0005ae4c



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OR


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2. By .Reg file :

Open notepad & paste 

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters]
“SackOpts”=dword:00000001

“TcpWindowSize”=dword:0005ae4c
“Tcp1323Opts”=dword:00000003
“DefaultTTL”=dword:00000040
“EnablePMTUBHDetect”=dword:00000000
“EnablePMTUDiscovery”=dword:00000001
“GlobalMaxTcpWindowSize”=dword:0005ae4c

Now save this file as speed.reg (in Windows).
Execute it and observe the change!

Thanks...