Headsets: https://www.headsetsdirect.com/yealink-headsets-everything-you-need-to-know-for-yealink-telephones

Default Credentials: admin / admin

1. Press and hold the OK key on the face of the phone for 10 seconds

or

1. Settings → Upgrade
   1. Reset to Factory Setting

1. Download and extract the latest firmware
   • http://www.yealink.com/SupportDownloadfiles.aspx?CateId=1298&parentcateid=142
2. Upgrade the firmware using the the web UI
   • Settings → Upgrade

1. Settings → Time & Date
   1. Time Zone
   2. Primary Server
      • 0.us.pool.ntp.org
   3. Secondary Server
      • 1.us.pool.ntp.org
   4. Daylight Saving Time

1. Network → Advanced
   1. VLAN

These settings have the phone on VLAN 241 and the PC switch port as untagged.

1. Account → Register → Account
   1. Line Active
   2. Label
   3. Display Name
   4. Register Name
   5. User Name
   6. Password
2. Account → Register → SIP Server 1
   1. Server Host
3. Account → Advanced
   1. Voice Mail
      • *97

1. DSSKey → Line Key1-11
   1. Line Key7 (your choice)
      1. Type = BLF
      2. Value = Extension to monitor (and speed dial)
      3. Label = Shown on LCD for Key7
      4. Line = Line key with associated registration
      5. Extension = Digits to send when key is pressed (ringing phone pickup)
         1. Often <asterisk><asterisk>