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10.5: A possible fix for slow dial-up in Leopard Internet
I recently upgraded from Tiger 10.4.11 to Leopard 10.5.6. Everything seemed fine, except for a drastic slowdown in my dial-up internet access via the internal modem. Oddly Safari and Firefox ran fine, but my Mail and FTP/Telnet were crawling under the new OS.

The solution that worked for me was to uncheck the "Use TCP header compression" setting, which can be found here: System Preferences » Network » Internal Modem » Advanced button (lower right) » PPP tab. On that tab, set the Settings pop-up menu to Configuration, and uncheck the "Use TCP header compression" box. Then click the OK button in the lower right, followed by the Apply button (in the lower right), and you're done.

If your modem is connected, disconnect and reconnect to implement the change.
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10.5: A possible fix for slow dial-up in Leopard | 4 comments | Create New Account
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10.5: A possible fix for slow dial-up in Leopard
Authored by: brett_x on Apr 07, '09 09:08:50AM

Really? There's a fix for a slow dial-up connection? What do you get out of it.. fast dial-up?

/sorry.. couldn't resist... I know it's all relative, and I'm sorry that some people are stuck on dial-up. Although now that i think of it.. back in the day all the dial-up ISP's were using terms like "Lightning" and "Blazing" fast. So I guess there is such a thing as "fast dial-up".



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10.5: A possible fix for slow dial-up in Leopard
Authored by: crisss1205 on Apr 07, '09 02:00:54PM

People still use dial up?? =]



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10.5: A possible fix for slow dial-up in Leopard
Authored by: ratpH1nk on Apr 07, '09 07:40:12PM

What is this "dial up" that you speak of?



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10.5: A possible fix for slow dial-up in Leopard
Authored by: timhaigh on Apr 08, '09 08:54:28AM

Dial up is a form of communication used just after the bronze age.



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