Audio cutting out when on call

[Khristey C]

Several of us at office having same issue. We can hear caller fine but our audio is cutting off and choppy to the person on other end and only is resolved if you lean in within a few inches of monitor screen. We each have different headsets and all have recently replaced or upgraded thinking it was a headset issue. Some are hard wired and some are not. This has been going on for past few weeks and never an issue before that. Any help or suggestions of what the cause is and a solution would be appreciated.