Signaling - describes the way the signaling ABCD bits pass from the local extension to the remote extension and vice-versa. endToEnd = the signaling ABCD bits pass without change from local to remote extension. localTermination = the signaling ABCD bits received from the local extension are translated to different ON Hook/OFF Hook bit values and then passed to remote extension. This is relevant when the Local and Remote ON Hook/OFF Hook values are different.