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Beginner

Cisco 2911 Voice Router Integration with Skype for Business Server 2015

Please assist!
I am trying to integrate Cisco 2911 voice router as PSTN Gateway for SfB but having issue establishing SIP Trunk.
Calls from PSTN to SfB fails with Call Entry(Disconnect Cause=38).

Has anyone got this working? What can the problem be please

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Beginner

Please share SIP debugs from the gateway and maybe we can help.

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Thanks @Evgeny Izetov for your response

Please find attached the debug output.

 

 

Regards,

 

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