PC> I've been using an Avtek FlashModem 288 v.34 with the Cooee comms 

 PC> package and want to know what is an acceptable CPS download rate using 

 PC> Z-Modem when I've connected at 28800/V34/V42BIS to a host system 

 PC> running Netcom 28.8's (ie Melb PCUG BBS during the morning) about 30km 

 PC> from where I live. The Avtek is using the Motorola chipset. 

 PC>  

 PC> After beginning a typical download, it starts out at 3000+ CPS; after 



 3000 throughput means The speed has shifted down to a 26400 connect

 already, above about 3060 to 3300 is 28800



 PC> {at}60 seconds and a few CRC errors (say 8), it drops back to {at}1500 CPS



CRC errors are not errors caused by a noisy line, but between the

modem and the computer.



Down to a 14400 connect



 PC> then, depending on the file size, mellows out to {at}1300 CPS five minutes

 PC> and a few more CRC errors later. 



 Down around 12000 connect



 PC>

 PC> Is this an acceptable sort of performance? If not any ideas on what I 

 PC> could do to improve it, besides buying a Dynalink :) 



If you aim to improve your position, DON't buy a Dynalink.

It won't be any better that what is happening now.



 PC>  * OFFLINE 1.56 * ... Then, quite suddenly, and all at once, nothing 

 PC> happened. 



Down to a 75BPS connect here



Line noise MUST be your problem.

And there is little YOU can do about it.



Russell

--- Terminate 4.00/Pro