Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!cs.utexas.edu!uunet!murtoa.cs.mu.oz.au!munnari.oz.au!vuwcomp!dsiramd!csnz!paul
From: paul@csnz.co.nz (Paul Gillingwater)
Newsgroups: comp.dcom.modems
Subject: Re: Where is modem progress?
Message-ID: <42@csnz.co.nz>
Date: 5 Jun 89 19:49:24 GMT
References: <78700004@p.cs.uiuc.edu> <8196@killer.DALLAS.TX.US> <182@sopwith.UUCP> <581@gp.govt.nz>
Reply-To: paul@csnz.co.nz (Paul Gillingwater)
Organization: Computer Sciences of NZ Limited
Lines: 22

In article <581@gp.govt.nz> gpwrdcs@gp.govt.nz (Don Stokes, Govt Print, Wellington) writes:
+In article <182@sopwith.UUCP>, snoopy@sopwith.UUCP (Snoopy) writes:
+> Sort of amusing remembering my EE communications prof stating that 1200 baud
+> was the absolute maximum one could get over a phone line.  *grin*
+
+Just being picky, but my V22bis 2400 *bps* modem runs at 600 *baud*, ie
+four bits per baud. Your EE communications prof wasn't that far wrong. 
+I'm not sure what the modulation is on faster modems, but I suspect that
+the baudrate is <= 1200. 
+
+Anyone know what the modulations are on V32/HST/TB+PEP?
+
+Don Stokes, Systems Programmer    /  /   Domain:               don@gp.govt.nz

My PEP uses up to 512 carriers equally spaced over the 4 kHz assumed
bandwidth.  Each individual carrier might use 2-bit QPSK, 4-bit QAM
or 6-bit QAM depending upon line quality.

-- 
Paul Gillingwater, Computer Sciences of New Zealand Limited
Bang: ..!uunet!dsiramd!csnz!paul    Domain: paul@csnz.co.nz
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