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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: 29 Feb 1996 05:58:02 GMT
- Organization: __________
- Message-ID: <4h3f9a$t5e@news2.cais.com>
- References: <todamhyp-2802961822500001@bhppp31.bluehawk.com>
- Reply-To: floyd@tanana.polarnet.com
- NNTP-Posting-Host: tanana.polarnet.com
-
- 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
- >company. If so, is this document on the net and where? Thanks a bunch.
-
- I don't know of such a document, but there really isn't much to it.
-
- The minimum specifications that a telephone line must meet have
- been a matter of public record (FCC and/or your state regulatory
- agency) since the telephone industry was first regulated. As
- modem technology became more sophisticated (you can read that:
- "as cpu power became greater") the ability to actually attain
- something close to the theoretical maximum data transfer rates
- became possible. The v.32bis protocol was essentially designed to
- work over a telephone connection that met the minimum
- specifications (more or less). The v.34 protocol was essentially
- designed to make use of whatever the telephone line had to offer,
- almost right up to the best possible connect available (two phone
- lines in the same room as the CO switch).
-
- More or less what the phone company sells is a line that will work
- for a v.32bis modem (2400 baud, 14.4Kbps). They have no
- obligation to provide you, and do not claim, anything better. (And
- in some cases they actually provide worse when there is no other
- way to actually get you a working voice line, because in reality
- the "specifications" are targets, not absolutes).
-
- Hence, to the degree that you get more than a 14.4Kbps connection,
- you are fortunate. To the degree that any telco spends time
- working with you to improve the line beyond 14.4Kbps is an
- indication of generosity and good customer relations. Some
- telco's have a fair measure of that, and some have absolutely
- none. (It also depends on you, and it depends on the individual
- you happen to contact too.)
-
- Floyd
- AT&T Alascom
- --
- Floyd L. Davidson Salcha, Alaska floyd@tanana.polarnet.com
-