Path: utzoo!utgpu!water!watmath!onfcanim!dave
From: dave@onfcanim.UUCP (Dave Martindale)
Newsgroups: comp.dcom.modems
Subject: Re: rs232 over power lines (and hayes 2400)
Message-ID: <16285@onfcanim.UUCP>
Date: 29 Sep 88 02:04:29 GMT
References: <2148@stpstn.UUCP>
Reply-To: dave@onfcanim.UUCP (Dave Martindale)
Organization: National Film Board / Office national du film, Montreal
Lines: 28

In article <2148@stpstn.UUCP> aad@stpstn.UUCP (Anthony A. Datri) writes:
>
>Also, I've almost decided to bite the bullet and shell out the $400
>and buy my 2400 baud modem from Hayes, since people have reported
>brain-damage (unspecified) in my previous favorite, the Packard-Bell.
>Any comments there?

The Hayes 2400 is also somewhat brain-damaged.  It's been a while
since I looked at one, but I do remember that

	1) There is no direct way to tell the modem to send back
	   result codes when in originate mode, but not in answer mode.
	   (You can get around this by having it reset to the state
	   stored in EEPROM on DTR drop, but see #2)

	2) You can tell the modem to hang up when DTR drops, OR
	   to reset itself to saved settings when DTR drops, but
	   not both

	3) The DTR light on the front panel is always on, regardless
	   of the actual state of DTR, even when the modem is configured
	   to use DTR to prevent answer/hang up the phone

On the other hand, it is better than the Hayes 1200.

We have a Vadic VA2400MNP that works well - it's not too configurable, but
it generally does what you want.  However, its MNP implementation
doesn't seem able to talk to anything else.