Mailing Lists: Apple Mailing Lists
Image of Mac OS face in stamp
 
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

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.
>
> There is no such thing as a 'digital line' with respect to a POTS (plain
> old telephone system) line. If the CO is digitally switched, then 56k
> modems MAY be able to run at their fully rated capacity of 53k bps. 53k
> bps is a FCC mandated maximum - as to why this is so, I have no clue...
>
Further clarification: Yes it must digital all the way on the answering
end. A digital POTS line is usually refereed to as an ISDN line. You need
an ISDN modem on the answering end, so an incoming 56k modem can connect
above 33.3. There may also be other solutions available from the phone
company, but ISDN is the only one I've seen.

For a 56k call to work the only analog part of the connection allowed is
from the calling modem to the first telephone switch.

Paul Bucher
Mount Joy Wire Corp

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



Visit the Apple Store online or at retail locations.
1-800-MY-APPLE

Contact Apple | Terms of Use | Privacy Policy

Copyright © 2007 Apple Inc. All rights reserved.