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how to tweak my 56k modem

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Name: tex_guy_0
Date: December 28, 2003 at 05:54:23 Pacific
OS: win98SE
CPU/Ram: 366/128
Comment:

Can someone help me how I can tweak my 56k Modem manually(to go faster) without downloading a program for this...maybe give me a good site for that..Thankyou

Joel



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Response Number 1
Name: Report_2
Date: December 28, 2003 at 06:02:05 Pacific
Reply:

Some have claimed that setting the "init string" to match the specific modem has helped a lot.
See http://www.modemhelp.org/inits/ for the specifics.

HTH
Bryan


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Response Number 2
Name: Tufenuf
Date: December 28, 2003 at 06:06:39 Pacific
Reply:

Joel, There really isn't a lot you can do to tweak a 56K modem. Most slow connection problems are caused by how far away from the phone company you live along with old phone lines. I live about 8 miles from the phone company and the best I ever connect at is 31.2Kps and nobody that lives near me connects any faster regardless of which ISP they use. I'll give you a link which some claim has helped but I won't guarantee faster download & upload speeds but you may want to try it.

56K Dial-Up Networking Tweaks And Fixes For Windows 95/98

Let us know if you decide to try it and the results.

Tufenuf


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Response Number 3
Name: elric
Date: December 28, 2003 at 08:55:30 Pacific
Reply:

G'day,

Yes, tufenuf and bryco are correct;however, if you have a winmodem (ie software modem) then you could possibly improve things by using an external hardware modem- I use an external modem and get connect speeds of 57k on my local telco lines. Other people I know who use winmodems get between 46-48k.
It does really depend on the quality of the lines.
regards and seasons greetings,
Elric


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Response Number 4
Name: Dave
Date: December 28, 2003 at 11:57:21 Pacific
Reply:

These are some registry tweaks that I used to increase my 56k connection. I connect at 45333 but at http://homepage.tinet.ie/~leslie/testpage.htm
it shows that I connect at 4480 to 4900.

BUT I have found a workaround to enable the use of a MTU lower than 576 with Win98, by applying the Registry changes described below. Another Win98 BUG squashed! 1 down, 1 zillion to go... Ouch! ;)
Thorough tests performed on 36 different PC clones (that I am aware of so far), running Windows 98 retail, SP1 or SE(U), demonstrate the validity and usability of this "fix". Please send me your feedback if using a MTU lower than 576 makes any difference on your computer.

Why use a MTU lower than 576? Because with most ISPs and Online Services (like AOL), even if they use a MTU of 576 at server end [read "ISPS KNOWN MTU VALUES" for details, also in MYTIPS95.TXT, part of my Win9x/2000/ME/XP + DOS 7/8 ©Tricks + Secrets files (W95-11D.EXE)], using a MTU lower than 576 might improve modem throughput, thus increase transfer rate, especially when accessing web pages with huge graphic files and/or when downloading large compressed files (i.e. ZIP format) from WWW/FTP sites.

WARNING: FIRST BACKUP YOUR WIN98 REGISTRY FILES TO A SAFE LOCATION!

The principle is to MATCH ALL MTU Registry values to the one you want (I used 548 in this example).

NOTE: A MTU lower than 512 becomes ineffective, resulting in too many small packets, which end up overflowing the network "pipe".

Experiment with different MTU values (i.e. 568, 560, 552, 548, 536, 528, 520, 512) to find your "sweet spot", depending on [too :(] many factors, like: your ISP's network type/speed, connection quality, phone line conditions etc.


TWEAK "IPMTU":
Start Regedit, go to these "Net" keys, and modify ALL String values shown below to read 548:

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Class\Net\0000
"IPMTU"="548"

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Class\Net\0000\Ndi\params\IPMTU
"default"="548"
@="548"

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Class\Net\0000\Ndi\params\IPMTU\enum
"0"="Automatic"
"1500"="Large"
"1000"="Medium"
"548"="Small"

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Class\Net\0002
"IPMTU"="548"

The "548"="Small" String above needs to be renamed to show 548.
If any of these Strings are not present, create them (read further below the paragraph on creating a new MaxMTU String for details on how to do this).
These are ONLY my "Net" keys, and you MUST make these changes ONLY under YOUR Net keys that display "DriverDesc"="Dial-Up Adapter" and "DriverDesc"="AOL Adapter" (the second one applies ONLY to AOL users who installed version 3.0, 4.0 or 5.0 of AOL 32-bit software).


Select the Small IP Packet size (after renaming the "576"="Small" Registry String above to "548") for your TCP/IP connections in Control Panel -> Network -> Dial-Up Adapter -> Advanced tab -> IP Packet Size -> Small (set in this case to 548).

TWEAK "MaxMTU":
Similarly, with the Registry Editor open, go to these "NetTrans" keys, and modify ALL String values shown below to read 548, IDENTICAL with the String values under the "Net" keys above:

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Class\NetTrans\0000
"MaxMTU"="548"

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Class\NetTrans\0001
"MaxMTU"="548"

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Class\NetTrans\0002
"MaxMTU"="548"

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Class\NetTrans\0003
"MaxMTU"="548"

These are ONLY my "NetTrans" keys, and you MUST make these changes ONLY under YOUR NetTrans keys that display "DriverDesc"="TCP/IP".
The MaxMTU String is not present by default if you have NEVER added it to your Registry, either manually by using Regedit, or by running a MTU "tweaker", like EasyMTU [360 KB, freeware].
To create a new MaxMTU String by using Regedit: right-click on each of your NetTrans 000n (0000, 0001, 0002, 0003 etc) subkeys that contain the "DriverDesc"="TCP/IP" parameter -> select New -> String -> right-click on the new String -> select Rename -> name it MaxMTU -> Click OK or press Enter. Now double-click on each "MaxMTU" String -> change its value to read 548 -> Click OK or press Enter.


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