To access voicemail, dial 7999 and then enter 7123# twice. To play or delete messages use the buttons on the headset. To transfer a call, hit the transfer button, enter the extension, and hit connect when the other person answers. To log a new support request, search for the contact in Active Directory, select categories for the issue, and provide details on the impact and urgency. If unable to resolve the issue, escalate to an incident and assign it to the appropriate technical team for further investigation.