It's late negotiation from sip trace. However I can see 183 session in progress that mean you must have "instant ring back" variable set in dialplan. You can try unsetting it. On Wed 31 Oct, 2018, 10:10 PM Ulrich Backes, <backes@solthor.de> wrote:

Hi all,

how can I switch to late negotiation? FS 1.8, new installed, default settings!

internal.xml: <param name=”inbound-late-negotiation” value=”true”/>

default.xml (added 'inherit_codec'): <action application="set" data="inherit_codec=true"/>

Expected result: late-negotiation. Actual result: early-negotiation (see image below).

Thanks and kind regards. Uli

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