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echo: aust_modem
to: John Clarke
from: Ray Mcconnell
date: 1996-10-16 16:54:08
subject: cps ???

Hi John,
 
 GW>> Could someone tell me what i should divide my connect speed by to get
 GW>> cps?
 
 RM> In actual fact, the 28800 number is in bits so it should be divided 
 RM> by 8 to make it bytes.

 JC> Wrong.  Divide by 10 - each byte (8 bits) is sent out wrapped inside 1
 JC> start  and 1 stop bit making 10 bits all up.  Error correction 
 JC> modems usually can achieve higher thoughput than the BPS/10 
 JC> since they strip off the start and stop bits but lose 
 JC> throughput in the error correction/detection process 
 JC> averaging out at about 115% to 116% of the BBS rate.

Well, 28800 divided by 8 makes 3600 cps, so why when it's divided by 10 it only
makes 2880 cps, and why is it that you're supposed to get 3300 cps?
So many lines are pathetic you don't even get 3300 cps, and Telstra expect
to be able to charge people by time online when it's their fault that we spend
so much time online.
 
 RM> This is what you should get:
 
 RM> 14400 - 1600-1700cps
 RM> 16800 - 1700-1900cps
 RM> 19200 - 1900-2200cps
 RM> 21600 - 2200-2450cps
 RM> 24000 - 2450-2750cps (average 2720)
 RM> 26400 - 2700-3050cps (average 3000)
 RM> 28800 - up to 3427cps (average 3300)

 JC> These are about what you should expect.

So why am I only getting 2700-3000 cps recently? Error Correction is enabled and
it always connects at 28800.

cyal8r
... Backup not found: (A)bort (R)etry (S)lap nearest innocent bystander.
___ Blue Wave/DOS v2.30 [NR]

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