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Reply To: Unidirectional Call


that kind of issue are quiet difficult to investigate because they oftenly have vendors dependencies or third part vendor dependencies (links issues). CAn you detail a little bit more the issue. Is it white spread behavior or only a few sites? Are these calls EFR, AMR, HR? Did you check transcoding side ? from my point of view, if this issue is not widespread it can be a simple Harware issue on transcoding side (or NSS side).