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- Path: news.gate.net!not-for-mail
- From: dhaire@gate.net (doug haire)
- Newsgroups: comp.dcom.modems
- Subject: Re: Line Conditions vs Speed
- Date: 14 Apr 1996 21:55:43 -0400
- Organization: CyberGate, Inc.
- Message-ID: <4ksaav$14bm@hopi.gate.net>
- References: <31714b31.14984846@freedom.interealm.com>
- NNTP-Posting-Host: hopi.gate.net
- X-Newsreader: TIN [UNIX 1.3 950824BETA PL0]
-
- Phil Pasteur (ppasteur@nexus.interealm.com) wrote:
- : I posted here asking why my recieve/send speeds as indicated in ATI6 report was
- : so different and what I could do tho help the problem. I only got one response
- : that said these speeds are determined by "line conditions". This is very
- : interesting. Do we not use the same LINE to transmit and recieve data. Is there
- : not only one connection between my modem and the one on the other end.
- :
- : In any case I cannot understand why the recieve speed will vary between 24 and
- : 28.8K but the send indication seemingly NEVER varies from 19.2. This amounts to
- : a 33.3% difference in speed for two operations occuring over the same
- : connection!!
- :
- : If anyone can give me a better explanation than just the overused "line
- : conditions" ( what conditions, why, why the receive/send difference, can it be
- : fixed) I would greatly appreciate it!!!
-
- A "line" is composed of TWO paths; the transmit and the receive; the
- modems use each side separately. Your home line is composed of 2 wires,
- one is called the "ring" and the other "tip" (battery and ground,
- respectively). The modem uses each of these wires independently. But
- that's not all. Between telephone offices (and through a number of
- switching machines), the transmit and receive paths are fully separated
- into 2 electrical paths.
-
- That's how you can have different speeds in each direction.
-
-