Is there any way to reduce the echo caused by the intercom in a small office? Basically if you can hear the person speaking the delay before you hear them over the speaker is causing an echo. With an analog/digital phone system there is no noticeable delay and no echo. I am using the Cisco SPA525G2 phones with Audio provided by the 3CX system. If the person on the other end of the intercom picks up and uses their handset or headset the echo is only by them (as they can hear the person talking and them coming over the headset delayed). Thanks for any ideas.