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CUCM sends 180 followed by 180 SDP for early media.

Hi,

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.

PBX                 CUCM

    ---- INVITE ------->

   <--- 100 Trying ----

   <--- 180 ringing ----

   30 ms

    <---- 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 ?

Regards,

Soman.

1 REPLY
VIP Super Bronze

CUCM sends 180 followed by 180 SDP for early media.

Hi,

Can you please send us the full CUCM trace. Please include calling and called number

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