With my Performa 400 I also got a 25 pin d to 8 pin mini-din connector cable(how lucky can that Performa 400 buy be for me:-)).

I am using a dial-up connection, but have serial speed installed allowing my Quadra 840av to utilise it's high speed serial port.

As I understand it my Quadra can send/recieve @ up to 230 (kb or whatever it is measured in), but now I am unsure if my modem can handle this with it being a 56k modem. If I purchased say a 230kb(lets at least pretend one exists) modem then would this work with my Quadra's fast geoport to at least transmit from modem to computer at the faster speed?

I understand the above to be a little garbled, I hope my point comes accross.

shaktiman

"One slip and down the hole we fall"

What about compression?

I was skimming through the LEM documentation on internet connections/browsing.

This document intimated that because a modem file compresses, although the isp is only doing 56k that this is perhaps quadrupled coming from modem to computer uncompressed?

shaktiman

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I allways wondered if you could dial-up twice & get 128k.

What about compression?

I was skimming through the LEM documentation on internet connections/browsing.

This document intimated that because a modem file compresses, although the isp is only doing 56k that this is perhaps quadrupled coming from modem to computer uncompressed?

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That's one of the good things about serial ports that do go faster than the modem :). What happens is in one second, the most your 56k modem can send is, say, around 5kb through the phonelines - that 5kb may, when decompressed by the modem after receiving it, come out to around 8kb. In that one second then, you receive 8kb from the modem to the computer, and have effectively received information at 8kb/second

Most text data such as webpages, text-only documents, or very simple pictures will compress incredibly well. jpg/mp3/sit/zip etc files which have already been compressed, won't see much of an improvement over the raw modem speed (usually).

Theoretically, if you had a very large file, all of the same letter (say, "aaaaaaaaa" repeated for a megabyte) then you could probably download that file at seemingly 23kb/second with a 230kbps serial port. Many machines only have 112kbps ports, so would only see a maximum of 11kb/second. Thats the extreme case, and real-world-data doesn't quite see that kind of improvement :D

dana

Quadra 605 Obsessions

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always thought a Geek Barn would be cool.

~Marchie

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if you have 2 modems, and an ISP that allows it, you CAN use Multi-Link PPP to get "double" your bandwidth. You'll pay alot for it tho.l It's not useful for homes really. If you were in a rural area and set up a co-op internet access, it'd be a decent method for the barn your modems are in.

always thought a Geek Barn would be cool.

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