rt-VBR
The rt-VBR service is provided for applications that have strict restrictions on delay and jitter, such as audio and video.
An rt-VBR connection is described by the PCR, sustainable cell rate (SCR) and maximum burst size (MBS). A station using the rt-VBR service is allowed to send burst traffic at PCR with the maximum traffic size being MBS without packet loss and the average cell rate being SCR.