[ale] PBX

[Alex Agle]

Hi Bill, You wrote:
>
>     Dan,
>     
>     I don't think this is a Linux thing (but it might be).  We have 
>     several 28.8 and 33.6 modems that we use for Notes & NT.  Connections 
>     speeds top off around 24.0 (24,000Kbps).  I've seen 26.4 a few times 
>     but not many.  We think we have narrowed the problem down to our PBX 
>     system.  I think the PBX systems is consistently degrading the line to 
>     prevent optimal connection speeds.  Any buyers on this theory?
>     
>     -Bill Hamilton 
>        
>
[snip]
>>
>> Has anyone been successfull at using 33.6 SupraFAXModems for dial in to 
>> a Linux box. I have one and can get it to answer the phone, but don't 
>> get connects higher than 19.2 usually. I've get a 4 port rocket port 
>> that it is hooked up to...
>>     

The PBX (phone line) is the culprit. What make the situation worse is that the
phone company can do whatever they want to the line so long as it is voice
quality. The only guaranteed line is the "data line" from the phone company
(read that as $$$$). I've heard of phone companies out west (of the
mississippi) who place companders (COMpress/exPANDER) in their lines. And
these magical electronic boxes play havoc with modems. Voice sounds great, but
unusable with modems.

-- 
-= Sent by Debian Linux =-
Thomas Kocourek  KD4CIK
tomk at westgac3.dragon.com