CUCM sends 180 followed by 180 SDP for early media.
CUCM interacting with PBX from another vendor and facing some problem with early media. From the wireshark traces, i see that CUCM sends 180 followed by 180 with SDP which is causing an issue on other PBX. But my doubt is, i see the article says that CUCM never sends 180 SDP, only it handles 180 SDP if it receives from far-end.
---- INVITE ------->
<--- 100 Trying ----
<--- 180 ringing ----
<---- 180 /SDP -----
Is it bug on CUCM or expected since it claims that CUCM does not send 180 SDP ? Or can we avoid this situation by changing some configuration ?
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