Does RTP have a fixed packetization interval?
Some implementations assume that packet audio is sent with a particular packetization interval, e.g., 20 ms. This is wrong. While RFC 1890 recommends certain values and SDP allows to express a preference, implementations need to be able to handle all reasonable values. There is no constraint that G.711 or other sample-based formats is conveyed in multiples of a certain unit. Thus, an RTP packet with 123 samples of G.711 is perfectly legitimate and needs to be handled appropriately.
