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- Path: polarnet.com!floyd
- From: floyd@polarnet.com (Floyd Davidson)
- Newsgroups: comp.dcom.modems
- Subject: Re: 28.8 baud & telco responsibilities
- Date: 1 Mar 1996 05:47:09 GMT
- Organization: __________
- Message-ID: <4h630t$bit@news2.cais.com>
- References: <todamhyp-2802961822500001@bhppp31.bluehawk.com> <4h4kaf$dla@netaxs.com>
- Reply-To: floyd@tanana.polarnet.com
- NNTP-Posting-Host: tanana.polarnet.com
-
- alpert@netaxs.com wrote:
- >Brian M. Huey (todamhyp@bluehoc.com) wrote:
- >> I was wondering if anyone has written a document explaining why modem
- >> speeds of 28.8 are not sometimes guaranteed by the local telephone
- >
- >In case you hadn't noticed, the telephone network was designed
- >for analog VOICE communication. This salient fact is sometimes
- >lost on .edu "doodz" and other clueless youngsters. There is no
- >guarantee that an ordinary phone line will do anything but carry your
- >voice. Anything else is gravy.
-
- The PSTN was indeed designed for "VOICE communications", and I've
- spent about 30 years measuring the specifics of what that means.
- One thing you can be assured of is that there are specifications
- for telecom circuits, and they are technical specs, not just "will
- it pass voice".
-
- You can also be assured that v.32 and v.34 modems were designed to
- operate on telephone lines specified for voice communications. And
- that does mean there is a guarantee from the modem manufacturer that
- if used on a voice quality line you will indeed be able to carry
- gravy in terms of data bits. In general one can expect 14.4Kbps
- as a minimum. One can hope for more and usually be rewarded.
-
- That is considerably more than "carry your voice"...
-
- Floyd
-
-
-
- --
- Floyd L. Davidson Salcha, Alaska floyd@tanana.polarnet.com
-