Change in osmo-bts[master]: osmo-bts-trx: send dummy FACCH in the absense of RTP frames

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fixeria gerrit-no-reply at
Thu Aug 19 08:13:20 UTC 2021

fixeria has posted comments on this change. ( )

Change subject: osmo-bts-trx: send dummy FACCH in the absense of RTP frames

Patch Set 3:

> Patch Set 3: Code-Review+1
> That is an interesting solution to the problem, also interesting that the nanoBTS does it the same way. I would have expected it would just send silent voice frames.
> I guess you did check back that this does not interfere with DTX somehow but I am also not sure what happens on the RTP side during a DTX silence period. I just wanted to make sure that you are aware of this.

Hi dexter,

this is a very good point about DTXd. As far as I can say, it's currently broken in osmo-bts-trx. An alternative solution to my approach would be to move FACCH frame injection to the upper layers.

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Gerrit-Project: osmo-bts
Gerrit-Branch: master
Gerrit-Change-Id: I868afecbcb6890f40c8f146e3ce00e836b794dd3
Gerrit-Change-Number: 24846
Gerrit-PatchSet: 3
Gerrit-Owner: fixeria <vyanitskiy at>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: dexter <pmaier at>
Gerrit-Reviewer: laforge <laforge at>
Gerrit-Reviewer: osmith <osmith at>
Gerrit-Reviewer: pespin <pespin at>
Gerrit-Comment-Date: Thu, 19 Aug 2021 08:13:20 +0000
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