[Freeswitch-users] 180 SDP to 183 (SDP)

Hi list, could you me explain, why Freeswitch "transforms" 180 (SDP) receive from leg B to 183 (SDP) to leg A ? Ex: INVITE --> FS --> INVITE .... 183 (SDB) <-- FS <-- 180(SDP) thanks in advance -- Cordialement HUBERT Mickaël Ingénieur VOIP - Hexanet --