Transcoding is computationally expensive and the upper bound for quality is ulaw because you are using ulaw on at least one leg.
However opus is much better at mitigating the effects of packet loss.
Test with ulaw and if packet loss is a problem then try opus.

Russell




On Fri, May 13, 2016 at 10:43 AM, Gregor Nanger <gregor@infomedia.si> wrote:
I would please you for opinion.

If verto client use OPUS to freeswitch and then call is bridged to provider that use ulaw, than transcode happens.

Regarding performance, what do you think, should we also force verto client to use ulaw, so there is no transcoding? But I think OPUS is more reliable for transportation and quality?

Best regards, Gregor

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