Tweak your 56k dial-up modem

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Here are some tweaks (that I use for my modem) that will help you get the best possible speed for your 56K modem.

1)First of all download the latest driver for your modem, from the manufacturer’s website.

2) Download Cablenut & use the following settings:

DefaultReceiveWindow = 8192
DefaultSendWindow = 4096
DisableAddressSharing = 1
InitialLargeBufferCount = 10
InitialMediumBufferCount = 24
InitialSmallBufferCount = 32
LargeBufferSize = 4096
MaxFastTransmit = 6400
MediumBufferSize = 1504
PriorityBoost = 0
SmallBufferSize = 128
TransmitWorker = 32
FastSendDatagramThreshold = 1024
EnableFastRouteLookup = 1
EnablePMTUDiscovery = 1
IgnorePushBitOnReceives = 0
GlobalMaxTcpWindowSize = 8760
MaxFreeTcbs = 2000
MaxHashTableSize = 4096
MaxNormLookupMemory = 5000000
SackOpts = 1
SynAttackProtect = 1
Tcp1323Opts = 0
TcpLogLevel = 1
MaxDupAcks = 2
TcpMaxHalfOpen = 100
TcpMaxHalfOpenRetried = 80
TcpRecvSegmentSize = 1460
TcpSendSegmentSize = 1460
TcpTimedWaitDelay = 30
TcpUseRFC1122UrgentPointer = 0
TcpWindowSize = 8760
MaxConnectionsPer1_0Server = 8
MaxConnectionsPerServer = 4
DefaultTTL = 128
DisableUserTOSSetting = 0
TcpMaxDataRetransmissions = 6
DefaultTOSValue = 92

3) Open your registry (start -> run -> type regedit) and change the following registry entry:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\AFD\Parameters

Add the parameter BufferMultiplier and give it a value of 400 hexidecimal which will make it 1024.

4) Download TCPOptimizer and use the following settings:

Under ‘General Settings’ tab select ‘Custom settings’ and use the following settings.

MaxMTU - 1500
TCP Receive Window - 8760
MTU Discovery - Yes
Black Hole Detect - No
Selective ACKs - Yes
Max Dup ACKs - 2
Time to Live (TTL) - 128
TCP 1323 Options - uncheck both boxes

Under ‘Advanced Settings’ tab:

Max Connections per Server - 4
Max Connections per 1.0 Server - 8

Then select Apply changes and reboot your computer.

5) Go to Network Connections from the Control Panel - right click on your internet connection and select properties, uninstall QoS Packet Scheduler.

6)Go to the registry entry and change the following settings:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\ServiceProvider

Class - 1
DnsPriority - 1
HostsPriority - 1
LocalPriority - 1
NetbtPriority - 1

6) Increase the speed your modem connects.

Right click on “My Computer” then go to “Properties” then go to “Hardware” then go to
“Device Manager” then go to “Modems” Then select that tab so it scrolls down, then go to
your modem, and right click and go to “Properties” then go to “Advanced” Then in the box
saying “Extra Settings/Extra Initialization Commands” type in that box: atx3

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9 responses so far,

  1. 1

    O'Neal

    May 30, 2006 at 5:37 pm

    I Did all that, and It didnt even work :-(

  2. 2

    jibber

    May 31, 2006 at 5:31 am

    works for me. thanks! :)

  3. 3

    Qwerty Maniac

    June 1, 2006 at 1:25 am

    ewww too big name… spoils the page…

  4. 4

    johntp

    June 1, 2006 at 4:32 pm

    O’Neal- It had worked for me when I was on dial-up.

    Qwerty- I fixed the name :-)

  5. 5

    Webb

    August 14, 2006 at 12:09 pm

    Thank you for putting this all together works great .

  6. 6

    SteveB

    September 16, 2006 at 8:52 am

    Followed all your instructions very carefully. Afterwards tried to dial my ISP and could not even connect. Not really sure at this stage what the problem is. It may simply be that the string you supplied is not suitable for my external Acer 56K surf modem. I will do some more experimentation.

  7. 7

    SteveB

    September 16, 2006 at 6:28 pm

    Found the problem was with the modem string given. The whole procedure minus the addition of this string allowed my modem to connect and I noticed a small improvement to my data speed.



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