No dial tone on phone after replacing modem.

I have the same problem.  I just installed the new gateway and now there is no dial tone on landline.  All incoming calls go directly to voicemail.  I've reset the gateway.  The phone is connected directly to the gateway, so it is not house wiring.  I have confirmed phone connections on the gateway are applied correctly to the telephone port, applying them exactly the way they were in the old gateway and as per new instructions.  Television and Internet are working.  I have rebooted the gateway, and it did not solve any problems.  I cannot be down for days like so many of your other customers are experiencing.  I hope you can see how concerning this is.  The remote technician rebooted the gateway and said the television and internet services are working.  I told him a third time it is the voice (telephone service).  This is a KNOWN ongoing problem.  Why did they send out broken gateways?  Does anyone know if there is a class-action law suit over this?