UNIStim phone registers by specifying the node ID and TN number. The node ID can be of maximum four digit length. You can configure the node ID in the Node ID attribute on System Manager. In the background, Device Adapter registers the phone as regular SIP endpoint by using the Communication Profile password. The Communication Profile Password is obtained from the System Manager database which has a replica on the Avaya Breeze® platform server. Other SIP stations cannot log in to the same extension until the end user knows the Communication Profile password.