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Re: Remote Access Hardware for Apple/OSX

>The reason for this is that 56k modems can only "speak" 56k when
connected directly to a digital line.

Just a clarification on this point to be exacting with regard to
specifications:

I believe Michael was saying that the telephone switching office (Central
Office - CO) must have new, fully digital switching equipment and NOT the
older analog/relay type switching equipment.

Actually, no.

A 56k modem cannot communicate with a 56k modem at 56k. period. In order for your ISP to have a 56k dialin, they have a bank of special devices which must be digitally connected to the CO.

If you have an ISDN line, & your friend has an ISDN line, & you each connect up a 56k modem to the POTS jack, you've got about the cleanest signal you can get, & you're guaranteed that the CO is digitally switched...but the modems will STILL connect to each other at 33.6k.

When you use a 56k modem, your signal is analog...when it hits your CO, it becones digital. In order for 56k technology to work, it can NEVER go back to analog, it must stay digital when it goes to the recipient's CO, it must stay digital when it hits the recipient's building, & it must stay digital when it hits the receiving "modem". Another 56k modem can only speak analog, so it can't work as the receiving modem, at 56k.

Another way to look at it is that 56k technology is asymmetrical, where you can download at 56k, but you can only upload at 33.6. Well, when you're connecting (2) 56k modems, traffic in either direction is both upload and download, depending on which modem you're asking...& data transmission always slows at the speed of the slowest link, so no matter what, you're relegated to 33.6.

HTH
Mike
--
Michael G. Schabert, Mac Guy
Miranda Graphic Systems, publishers of Graphic Power
http://www.graphicpower.com

References: 
 >Re: Remote Access Hardware for Apple/OSX (From: greg <email@hidden>)



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