On any of the 79x5 instruments, it appears if you have your headset hooked up to the headset port on the back of the instrument AND the handset plugged in to its port on the back as well- that whenever you have an active call using the headset that it also enables the handset for some reason and you get an "echo" because you are hearing the other output. There is no known setting that I am aware of that will "fix" this issue.
Our suggested workaround for the time being is- you can hook up the headset where you plug the handset into the headset base unit instead of the port on the back. The only difference is they will have to plug the cord from the headset base to the headset port on the back of the instrument (not the handset port). This will eliminate the echo issue. However, it will also disable the use of the handset entirely.
I guess their intention for a wireless headset is better used when someone is not sitting right by their phone and has some distance so
that the "echo" is unnoticed...I guess. Any other ideas?
Craig L. Pollitt