There are SIP enabled phones & gateways, with other SIP enabled devices coming. Because SIP is a distributed architecture there are many caveats & possibly *missing* features - take care in your design & make sure everything you need is available. I'm sure you're not getting the clarification you would like - feel free to contact me off line.
Currently the 7960 IP Phones can support either SIP
or Skinny (Call Manager) protocol. The same
hardware is used, but different software would need
to be loaded. It can only operate in one-mode, not both at the same time. Currently, CM does not support SIP.
Call processing in SIP is done by "SIP Servers", which might be functioning as Proxy, redirect or Registrar servers. With SIP being a distributed architecture, "features" could resides on the SIP Phones, or on SIP Servers.
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.