Use the Emergency Calls from Unnamed IP Endpoints feature to register an IP telephone without an extension number. The Emergency Calls from Unnamed IP Endpoints feature places the IP telephone into Terminal Translation Initialization (TTI) service. Users can dial a Feature Access Code (FAC) to either associate an extension number with a telephone, or to dissociate an extension number from a telephone.

A person can use an IP telephone that is in TTI service to make emergency calls if Communication Manager is appropriately administered.