VoIP stops working after setting fixed bandwidth per IP

I was used ip teliphone by using an ISP And under a mikrotik, but some days ago i have bind all user ip for fixed bandwith ,after doing that my teliphone is not working. not working means outgoing call and incoming call ok but no voice send to one point to another, even out network call same and in same lan phone to phone also same no voice

Thanks
Koushik roy