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- Newsgroups: comp.dcom.modems
- Path: news2.new-york.net!not-for-mail
- From: roccella@bc.cybernex.net (Matthew Roccella)
- Subject: Re: Connecting two modems across 2 wire conductor.
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- Message-ID: <DKypo2.FFG@news2.new-york.net>
- References: <4bd6bl$61j@news.infoserve.net> <pumaDJzyLG.G76@netcom.com>
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- Date: Wed, 10 Jan 1996 11:46:03 GMT
-
- puma@netcom.com (Gary Breuckman) wrote:
-
- >In article <4bd6bl$61j@news.infoserve.net>,
- >khoy <khoy@unix.infoserve.net> wrote:
- >>I would like to connect two RS-232 serial devices across a two wire
- >>conductor using modems. The serial devices do not have intelligence to
- >>send AT commands. The only modems that auto connect are lease line
- >>modems that have the AT &L command. The US robotics Courier have this
- >>command, but they are expensive since I only need 2400 baud.
- >>
- >>Is there another method to send data between two serial devices? Can I
- >>use cheaper off the shelf modems such as the Sportster for this?
- >>
-
- >There are also devices known by names such as "limited distance adapters"
- >or "line drivers" that could do this - the lower priced ($60-90 each)
- >are mostly 4-wire devices with a distance range of several thousand
- >feet and speeds of 9600 or 19200 at that distance. There are some 2-wire
- >ones but they are more expensive, can you manage to find 4 wires?
-
- >If the distance is really short you could use null modem cables, up to
- >several hundred feet or so (yes, I know, specs say 50-ft...).
-
- >The line drives are in the various catalogs, Black Box, Inmac, etc.
-
-
- >--
- >puma@netcom.com
- Motorola's UDS FasTalk II supports 2 - wire operation in sync. mode.
- The baud speed of the modem is 14.4. You can put it in "dumb" mode
- after you configure it so that as soon as you turn your serial devices
- on, it can dial a number, or just go online. It's a great performer. I
- bought mine from MicroWarehouse for $140.00.
-
- Matthew
-
-