When you say "one voice user" is that a device registered to the Total Access?
Please explain "outbound calls on the same line".
How are you connecting to the PSTN?
If possible send a basic network diagram.
I came across this post and wondered if you still needed assistance. Please let me know if you do and we can work on this.
This issue has been resolved. This turned out to be a media profile type set incorrectly in our VoIP switch. Thanks for the replies.