Yealink IP Phones Auto Provisioning GuideivZero Touch ........................................................................................................................... 21Plug and Play (PnP) Server ............................................................................................... 23DHCP Options ..................................................................................................................... 25Phone Flash ......................................................................................................................... 26Configuring Wildcard of the Provisioning Server URL.................................................... 27Triggering the IP Phone to Perform the Auto Provisioning ..... 31Power On ............................................................................................................................. 31Repeatedly.......................................................................................................................... 32Weekly ................................................................................................................................. 33Auto Provision Now ............................................................................................................ 34Multi-mode Mixed ............................................................................................................. 35SIP NOTIFY Message ......................................................................................................... 35Auto Provisioning via Activation Code ............................................................................ 36Downloading and Verifying Configurations .......................... 39Downloading Configuration Files ..................................................................................... 39Resolving and Updating Configurations ......................................................................... 39Using MAC-local CFG File ................................................................................................ 40Verifying Configurations .................................................................................................... 40Troubleshooting ...................................................................... 43Glossary .................................................................................. 45Appendix ................................................................................ 47Configuring an FTP Server ................................................................................................ 47Preparing a Root Directory ............................................................................................ 47Configuring an FTP Server ............................................................................................. 48Configuring an HTTP Server .............................................................................................. 50Preparing a Root Directory ............................................................................................ 50Configuring an HTTP Server .......................................................................................... 51Configuring a DHCP Server .............................................................................................. 54