If the caller wants to leave the voicemail while he/she is in call queue then you can turn ON this feature and caller can leave voicemail by pressing asterisk(*) key from
his/her phone and you can check the voicemail from the activity feed.
Steps:
●Login to your CallHippo account using the link(web.callhippo.com)
●Click on NUMBERS tab present on left hand side of the tool
●Click on the gear symbol for number setting and scroll the page to the last
●Turn ON “Leave a Voicemail” from Call Queue section