Communication barring permits clients to progressively block incoming communications from callers whom they consider as undesirable. Services are assisted Communication Notwithstanding are: 1. Incoming Communication Barring (ICB) cancels incoming calls that fulfill configured conditions on behalf of the terminating Multimedia Telephony client. 2. Anonymous Communication Rejection (ACR) is an uncommon case of ICB, which permits cancelation of incoming calls from an anonymous source on behalf of the terminating Multimedia Telephony user. 3. Outgoing Communication Barring (OCB) is a service that cancels outgoing calls that fulfill configured conditions on behalf of the originating Multimedia Telephony user.