Hi, according to RFC 3960, " If the UAC receives early media from different UASs, it needs to present it to the user. If the early media consists of audio, playing several audio streams to the user at the same time may be confusing. On the other hand, other media types (e.g., video) can be presented to the user at the same time. For example, the UAC can build a mosaic with the different inputs. However, even with media types that can be played at the same time to the user, if the UAC has limited bandwidth, it will not be able to receive early media from all the different UASs at the same time. Therefore, many times, the UAC needs to choose a single early media session and "mute" those sending UPDATE requests. ... Therefore, UACs typically pick one early dialog randomly and mute the rest. " So I ask: Does PJSIP uses to mute some early dialog if the UAC receives multiple SIP 183 for early medias, in case of a forked call? If yes, is there a way to turn off such behavior of the UAC? Best regards!! RODRIGO PIMENTA CARVALHO Inatel Competence Center Software Ph: +55 35 3471 9200 RAMAL 979