MTU

[tio]

I read the article "Optimizing Dial-Up Modem Connection Speed". However, the instructions didn't seem very clear.
It keeps saying something like, "remember this number for the next step, etc, etc.
It than says stuff like, "expand the sub-key with the same four digit number as from the previous step." I don't understand what it means by that.
I understand what "expanding" is but what does it mean by saying, "expand with the four digit number"???

Please tell me how to do this "very cool" thing in a clearer fashion if possible.
Thank You so Much!! :)
I would appreciate your courteous return response.
Thanks!
Tio

[POBrien]

Here's some tips that I have learned over the years. If you drill down into the registry the numbered subkeys will make sense.

Backup your registry!

1. Go to Control Panel>Modems. Click the Properties button. (notice the com port assigned). Set maximum speed to 115200. (Only connect at this speed should not be checked). Click the Connection Tab. Click Port settings button. Make sure fifo is checked and both slider bars are all the way to the right. Now go to the Advanced Button. In the extra settings field type S11=40(that's S eleven). Ok out of everything and close.

2. Go to the Dialup Networking Folder. Select the connectoid that relates to your DUN connection. Right click it and select properties. Select the Server Types tab. Enable Software Compression should be checked. TCP/IP should only be checked. Click on the TCP/IP Settings button. Check Use ip header compression.


3. Open your system.ini file. Within the [386Enh]
add COMBoostTime=1 and COMXBuffer=1024 (com X being the assigned com port for the modem)respectively. Com3 is assigned to my modem.

[386Enh]
COMBoostTime=1
COM3Buffer=1024
ebios=*ebios
woafont=dosapp.fon
mouse=*vmouse, msmouse.vxd
device=*dynapage
device=*vcd

4. Open regedit. Drill down to:

[HKEY_LOCAL_MACHINE\System\CurrentControlSet\Servic es\VxD\MSTCP]

Add the String value DefaultRcvWindow with value data of 8192
(I have dsl, mine reflects 32120)


[HKEY_LOCAL_MACHINE\System\CurrentControlSet\Servic es\VxD\MSTCP]
"LMHostFile"="C:\\WINDOWS\\lmhosts"
"LocalCopyMade"="1"
"EnableDNS"="1"
"Lanabase"="0"
"EnableRouting"="0"
"Tcp1323Opts "="1"
"SackOpts"="0"
"HostName"="kevin"
"Domain"="pacbell.net"
"SearchList"=""
"NameServer"="206.13.28.12,206.13.31.12"
"DefaultRcvWindow"="32120"

Next, head off to:

[HKEY_LOCAL_MACHINE\System\CurrentControlSet\Servic es\Class\NetTrans\0006]
(the 0006 is the subkey that relates to my dialup adapter. Yours will probably be a different number). (To find out which subkey is your dialup adapter go to:[HKEY_LOCAL_MACHINE\System\CurrentControlSet\Servic es\Class\Net]
click on a numbered subkey. Look to the right and you'll see which adapter that subkey is for. when you determine the correct numbered key. go back to Nettrans and find the match).

Add a String value MaxMTU with value data of 576.
Add a String value MaxMSS with value data of 536.

[HKEY_LOCAL_MACHINE\System\CurrentControlSet\Servic es\Class\NetTrans\0006]
"DriverDesc"="TCP/IP"
"InfSection"="MSTCP.ndi"
"IPAddress"="0.0.0.0"
"IPMask"="0.0.0.0"
"DeviceVxDs"="vtdi.386,vip.386,vtcp.386,vdhcp.386,vnbt.386"
"InstallVnbt"="0"
"InfPath"="NETTRANS.INF"
"ProviderName"="Microsoft"
"DriverDate"=" 4-23-1999"
"DevLoader"="*ndis"
"MaxMTU"="576"
"MaxMSS"="536"


reboot.