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Path: utzoo!utcs!mnetor!seismo!caip!cbmvax!porter
From: porter@cbmvax.UUCP
Newsgroups: net.micro.cbm
Subject: Re: 1200 baud modem query
Message-ID: <520@cbmvax.cbmvax.cbm.UUCP>
Date: Sat, 12-Jul-86 11:35:39 EDT
Article-I.D.: cbmvax.520
Posted: Sat Jul 12 11:35:39 1986
Date-Received: Sat, 12-Jul-86 22:44:27 EDT
References: <1730@udenva.UUCP> <157@ozdaltx.UUCP>
Organization: Commodore Technology, West Chester, PA
Lines: 25

> 
>  Be sure you try the modem out befor you leave the store. I have
> several users on this system running Commodores and the 1670, and
> they tell me it is letting a tremedous amount of "garbage" though
> to their computers in an on-line situation.
> Scotty
> ...ihnp4!killer!ozdaltx!root
> 

My email bounced once, so I am not sure I got through.

The 1670 has a switch on the back of the modem for "line balance".
In noisy situations, try this switch.  It changes the impedance of
the telephone line (which every claims is 600 ohms, but no two
phone lines are ever the same, and never 600 on the dot)  which
may be a problem is you are dealing with a PBX system.

We have the world's worst PBX at commodore (Northern Telecom)
and ANY/ALL modems available on the open market have terrible
noise problems, unless they have adaptive equilization,
or in the case of the 1670, a line balance switch.

Hope this helps,
Jeff Porter
Commodore Engineering