Audio and multimedia calls require high bandwidth and low latency for the best user experience. Call Admission Control, also known as Bandwidth Management, prevents degradation of call quality by limiting the number of concurrent calls over links that have limited bandwidth.

Call Admission Control regulates the total utilized bandwidth, the total number of calls, or the total number of packets or data bits passing a specific point per unit time. If the defined limit is reached or exceeded, a new call might be prohibited from entering the network until at least one current call terminates.