I have just started using a Pipeline 75 for connection to an ISP. I am getting a busy signal when dialing into the pot line for voice. This is an irradic behavior as sometimes it will work properly and sometimes not. It does not seem to matter if I am connected with both B1 and B2 or just B1. In fact it seems to work a little better when I set the configuration to always use both the B channels. I have used another router on this line and it worked properly so I am reasonably convinced it is not a provisioning problem. Any insite?