"Of course, the "SIPPING 16" does not exist. The vendors who have latched onto the "SIPPING 16" idea do not even agree on what the sixteen features are. The IETF does not standardize features, and there is no finite limit on the number of features which can be built using the SIP protocol. The concept of counting features is a vestige of the same dubious practice in the telephony community."
Re: Sipping-16 and Sipping-19 is supported by Cisco?
From what I could search there is nothing on compatibility about either, and after reading from that good description, if this is not something that is a real standand and the features will change depending on who you're asking there can't be a straight answer.
It would be better if you ask what features/RFCs you're looking compatibility with.
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.