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180 ringing not traversing the SBC

edited Jan 4, 2022 3:32PM in Acme Packet (MOSC) 2 commentsAnswered

Hi,

i have an issue regarding 180 ringing which is not traversing the SBC. the call flow is the following:

Provider1 --> SBC1 --> Sip routing Engine --> SBC2 --> Provider2

Invite > Invite > Invite > Invite

......

????? < 180 Ringing < 180 ringing < 180 Ringing


the provider1 doesn't receive the 180 Ringing. The call is setup but call dropped by provider 1 after pickup. here is the 180 Ringing message receive on core on sbc1:

SIP/2.0 180 Ringing


Do you have an idea why the 180 message is not propagated to provider1?

Thx

Kr

Juan

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