one way speech

[newvoipuser]

whenever a call is made, what I say is heard on the other end, but not vice versa. So it is always one-way talk.
Nothin is changes on the router nor on the adapter.
Let me know if any port forwarding is reqd.
secondly, cud it be a phone instrument issue?

[ccureau]

Your firewall is blocking the voice. The administration here asks that you open UDP ports 16,000 through 16,500 and allow traffic from 216.143.130.