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falconia has posted comments on this change. ( https://gerrit.osmocom.org/c/osmo-bts/+/32110 )

Change subject: common+trx: add rtp ecu-downstream vty option ......................................................................

Patch Set 1:

(1 comment)

Patchset:

PS1:

I'm not sure what you mean with "downstream" here. […]

No, "downstream" here means down the RTP stream from the BTS: after the RTP stream is emitted from the BTS and passes through two OsmoMGW instances (BSC, then MSC), it goes to an external software component (themwi-mgw in my case) that applies the full Rx DTX handler of GSM 06.31 or 06.81. That full Rx DTX handler includes an ECU function that is more sophisticated than the one in libosmocore, and intertied with other (not strictly ECU) Rx DTX functions - this type of use scenario is when having OsmoBTS apply the libosmocodec ECU becomes undesirable.