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- Newsgroups: comp.dcom.modems
- Path: sparky!uunet!spool.mu.edu!umn.edu!kksys.com!edgar!technix!jfw
- From: jfw@technix.mn.org (Jerry Wallace)
- Subject: Re: Optimizing Telebits.
- Message-ID: <1992Sep08.142009.9230@technix.mn.org>
- Organization: Private System - Saint Paul, MN
- References: <1992Sep6.135028.22661@homecare.com> <1992Sep7.182013.7094@ntg.com>
- Date: Tue, 08 Sep 1992 14:20:09 GMT
- Lines: 24
-
- Dave Platt writes:
-
- >>4) And last - this is just a little pet peeve. For some reason these
- >>WorldBlazers think they need to retrain when they lose the modem on
- >>the other side. The other end will cut off the connection and the
- >
- >That's pretty much in the nature of V.32, I believe. V.32 uses a single
- >carrier frequency, with adaptive echo cancellation. It's not terribly
- >easy for a V.32 modem to tell (quickly) that its peer at the other end
- >has disconnected, since it continues to "hear" the carrier signal come
- >back (its own carrier, delayed and mixed). If the modem is more quick
- >to hang up when carrier is actually dropped, it will probably also be
- >more prone to disconnect prematurely if there's a burst of noise on the
- >line.
-
- I have been told by Multitech Tech Support that when a v.42 connection
- is closed the modems exchange a Disconnect Frame. If this is implemented
- in the T3000/WB, it should hang up as soon as DTR drops on the far end.
- My WB sometimes disconnect immediately, sometimes not.
- --
- Jerry Wallace TechNIX, Inc.
- Electronic: jfw@technix.mn.org 103 Healy Building
- Acoustic: Installing 2301 Como Avenue
- Ballistic: Hah! Saint Paul, MN 55108
-