TIP: Click on subject to list as thread! ANSI
echo: aust_modem
to: Arthur Marsh
from: Russell Brooks
date: 1996-12-13 17:04:26
subject: why AXE is better than S12 for 3360

AM> As you can imagine, the 3429 symbol rate of V.34 requires about 3429 Hz 

 AM> of

 AM> bandwidth to the 3 dB points, therefore with a low frequency cut-off of 

 AM> 244 Hz

 AM> and a centre frequency of 1950 Hz, one needs a high frequency cut-off of 

 AM> 3672

 AM> Hz, which is higher than the 3400 Hz 3 dB cut-off of S12-S12 connections 

 AM> and

 AM> still higher than the 3500 Hz 3 dB cut-off of AXE-AXE connections.



 AM> The V.34 probe tones of 3450 Hz and 3600 Hz some-how have to figure out 

 AM> the

 AM> high frequency roll-off of such a connection...



This explains the Major blunder I made, when I recently asked Telstra to 

move me from AXE to S12, in the hope that I might improve my connects.

Due to being able to Train my line cards.

Things were bad before......now they are worse.



Suicide comes to mind



Russell



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