Path: utzoo!attcan!uunet!van-bc!ubc-cs!undergrad.cs.ubc.ca!gchow
From: gchow@undergrad.cs.ubc.ca (george kai yee chow)
Newsgroups: comp.dcom.modems
Subject: Re: How much faster is ZMODEM?
Summary: Zmodem is very efficient
Keywords: Zmodem
Message-ID: <1990Feb27.200702.1995@undergrad.cs.ubc.ca>
Date: 27 Feb 90 20:07:02 GMT
References: <51@garth.UUCP>
Sender: root@undergrad.cs.ubc.ca
Reply-To: gchow@f1 (zv2fh0z0c4eJQ)
Organization: none
Lines: 16

In article <51@garth.UUCP> dbarnes@garth.UUCP (Dave Barnes) writes:
>How much faster is Zmodem than, say, Ymodem Batch (which I
>currently use because some BBS's give you a "log off after
>download" option, which I find attractive).  Since it costs
>money to register, I'll have to analyze how much I'd save
>in long distance or message unit fees.
>
>I have a 2400 baud modem, in case that matters.  
>

From my experience with my ATI 2400etc/e which is an MNP-equipped
modem, I have gotten about 270cps at best with Zmodem and MNP.  Without
MNP, I usually get 236+cps which is about 95% efficiency.  However,
the best thing about Zmodem is that it is much more robust than 
Ymodem; it has dynamic packet sizing and can resume a transfer even if
you lose connection.