Cisco 2911 Voice Router Integration with Skype for Business Server 2015

[ayokunmi_o]

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

[Evgeny Izetov]

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

[ayokunmi_o]

Thanks @Evgeny Izetov for your response

Please find attached the debug output.

Regards,