The IP-phone has a non-volatile memory in itself. Once the ringtones are downloaded from TFTP it stores there in this part of the IP-Phone. Now even when the ringtone which is used by an IP Phone is deleted from the TFTP it still exists in the memory on the phone until the configuration of the phone is erased which erases the contents on the non-volatile part. As this Erasing can be performed on the Phone (hardware) manually, we need to do it going to the phones and under Settings>Network Configuration>Erase Configuration.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.