Direct Routing SBC Teams error code 503

New Contributor

All can be well, then suddenly we are not able to make external calls via Teams - we have direct routing configured Ribbon SBC Lite 

the error code which we see is 503?   Anyone else have this experience - recommendations for investigation would be appreciated 

 

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3 Replies
Hello
Maybe the first thing I would check would be SBC log files to check if something is there when trying the call
https://support.sonus.net/display/UXDOC81/Working+with+Logging

What about inbound calls?
The logs show 503 error - inbound not affected
Can you share the 503 error? probably it has more details
503 can have multiple causes

Here you have more details about that

https://support.sonus.net/display/UXDOC61/Translating+SIP+Responses+in+SIP-SIP+Calls+Using+the+Pass-...