Check out what Matt Dixon wrote on 07 Jun 96  09:37:00:
 Matt_D>         Have any of you ever run your Supra modem on a pair gain
 Matt_D> and voice calls are all messed up, but the local phone provider
 Matt_D> claims everything is fine, and it is just the pair gain system
 Matt_D> that is causing modem failure.
 Matt_D>         Anyway, if you ARE/HAVE used your modem on this type
 Matt_D> system let me know if you had to do something special to get it
 Matt_D> to work, or if it ever worked correctly.
Havin fought the pair gain and the phone company I called the phone company 
and told them if another phone provider came to the area I was switching!  I 
had them disconnect the line used for the modem since the hiss from the pair 
gain line would cause me to drop carrier.
The phone company was called again and they came out with a stand alone 
Motorola modem and tested my line used for regular phone use.  It had been 
connected with a wrong device of some sort in the office.  The tests were 
conducted by one of their noise experts and a supervisor.  The other end was 
a long distance away.  Most of the problems went away when the pair gain was 
disconnected. 
A proper operating pair gain line should not hiss and disturb the modem 
however it was never resolved and the second line was re-installed as a non 
pair gain line.  
I feel the phone company should work with you and solve the problem.  
Maybe Craig Ford can jump in here and shed some more light on the situation.
I have tried to get a phone standards file from a publishing company without 
any luck.  
Here is hoping you problem will be solved soon.
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