PB 180 modem upgrade?

I've a PowerBook 180 with a slowwww GV Powerport Gold 14.4 internal modem.  I want to go to a faster modem, either internal or external, but am unsure just how fast I can go.  My service provider is soon to start up 56k service, but is my old PB 180 capable of such speed?  What is the weakest link--the serial port (if I go to an external modem) or processor stuff or ordinary telephone lines or ...?  (I hope it's not me!)
organicAsked:
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weedCommented:
That model should certainly accomidate a 28.8 as the serial ports hit at least 57.6. (you want a little room between your modem speed and your serial speed). If you plan on a 57.6 speed modem you should check to see what the maximum serial port speed is. If its 57.6 a 57.6 modem will work on it but may be a little slower than expected. if your serial port can reach 115.2 it will certainly accomidate a 57.6 modem. The weakest link is probably the phone lines. Ive heard from various people that the rerely connect at 56k speeds with a 56k modem. I rarely connect at 28.8 speeds. Its usually around 26.6 or even lower depending on line quality and/or interferrence. BTW you can check your serial speed in most connection proggys (Im sure ot/ppp has got a space to set the speed in there somewhere) if not you can call your local mac store and ask them.
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organicAuthor Commented:
Your typical connection speed is around 26.6k?  At how many bytes per second are you able to download files?

I guess what I really want to speed up is my actual download speed, which typically hovers around 500 to 1k bytes per second depending upon the day and time of day I'm logged on.  Certainly, this is a function of on-line traffic between myself and whatever www or ftp site I'm connected to, but is it also related to my 14.4k potential speed or any other PowerBook 180 factors?  If I pay for a 28.8, 33.6, or 56k modem, can I hope to find a proportional increase in my actual download speed?
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weedCommented:
when i say i connect at 26.6 i mean that i dont connect at full 28.8 speed. Not K per second. (I WISH!) for a 14.4 you SHOULD be getting around 1.4 k per sedond. 28.8 modems generally get 2.8 k per second...see the pattern? Updating to a 28.8 will certainly give you a speed increase. If youre only currently getting between .5 and 1 k per second you should take a look at your modem settings. you should be getting faster than that.
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