Forum Discussion
Microsoft Teams Direct Routing Outbound Calls not working (error 504)
Hello, I am trying to configure Direct Routing on my tenant, using my carrier's hosted multi-tenant SBC. They connected to my tenant with powershell and made all the needed configurations wit...
Ok me and my carrier found the issue.
The DNS record for the SBC FQDN was not properly set, thus not redirecting to the SBC IP.
bluecat In our case the DNS A record for the SBC was misspelled.
For instance instead of sbc.contoso.com it was set as sbv.contoso.com, so it was not possible to reach, as teams was looking for sbc.contoso.com.
From what I understood this error comes from a misspelled SBC hostname, or unreachable DNS name.
OK, Thanks for the reply.
- SergioGaray We did not solve the issue, we had to work around it by adding the the SBC's (i.e. New-CsOnlinePSTNGateway -Fqdn <SBC FQDN> -SipSignalingPort <SBC SIP Port> -MaxConcurrentSessions <Max Concurrent Sessions the SBC can handle> -Enabled $true)
