You can change the default Entry/Exit Chime or Name Announcement options for your account by logging in and clicking the Settings tab, then choosing Chimes & Name Announce in the left-side menu.

Click on the relevant slider to turn the chimes or name announce feature on (green) or off (grey) and click Save when you're done to lock in your selection. You can also turn off the hold music from this page. Disabling the music-on-hold means the first caller will hear short beeps until the second party arrives.