Hello,

Can FreeSWITCH be configured not to include P-Early-Media tag in it's 180 ringing? Is any of the boxes involved breaking the specs?

Call scenario is that far-end SBC sends INVITE to FS with P-Early-Media: supported tag.
Freeswitch routes call and replies with 180 Ringing with P-Early-Media: sendonly tag to the far-end SBC.

Far-end does not generate ringback when it sees P-Early-Media: sendonly. Freswitch does not provide in-band ring-back either (cause it's just 180 Ringing without SDP).

Last but not least, FreeSWITCH runs in bypass media mode.

Thank you,
Victor