[Asterisk-Users] still riniging problem

[Altus Syman]

Good day all
I have a problem with the new asterisk version.My setup,extensions.conf 
is like this:
If someone call in from the outside to the PSTN,asterisk wait 8s and 
then forwards the call to the sip user,the operator and she then 
transfer calls
My problem is,for the first 8s the ringing sound is normal but as soon 
as the call goes to the sipuser(operator) the ringing gets very fast and 
and some people thinks its a busy signal
Previous versions worked
Please help
Altus