Forum Discussion
Direct Routing and call transfers/parks failing
We have a Ribbon SBC hosted in the cloud, and nothing has changed. It's been working flawlessly for several months, and today my SBC as well as a few clients can no longer transfer or park calls. Log...
https://support.sonus.net/display/UXDOC90/Best+Practice+-+Troubleshoot+Issues+with+Microsoft+Teams+Direct+Routing
at the very bottom:
"Replaces" Header
Availability: Since 9.0.7
MS Teams Direct Routing will stop processing inbound SIP Requests which have "Replaces" headers. This change is automatically done by the SBC Edge software upgrade. No configuration changes are needed. For more information, refer to MC299922.
We're already on 11.0.0, so....
at the very bottom:
"Replaces" Header
Availability: Since 9.0.7
MS Teams Direct Routing will stop processing inbound SIP Requests which have "Replaces" headers. This change is automatically done by the SBC Edge software upgrade. No configuration changes are needed. For more information, refer to MC299922.
We're already on 11.0.0, so....
BrianC614 hmmm, we are on SWe Lite 9.0.2, looks like we might need to try and upgrade and see if we are still having the issue. This may not be the issue though since you are already updated and facing the same issue. It is definitely a little too coincidental that they made this change and all of a sudden we are having the issue. We weren't having the issue yesterday though, it just started today for us.
- We believe it's resolved the issue. I have noticed some oddities in the testing that seem to be isolated to my cell phone of all things, but all in all were at least better than we were before the downgrade. Hopefully nothing to impactful from downgrading in the end.
- It seems like the downgrade to 9.0.7 worked. Having to do some more thorough testing to be sure, and we're at least in a better place than we were before. I'll update once I've done more testing.
- Chatting with Ribbon Support - the updates are in 9.0.7, but not 11.0.0. They say they will be in 11.0.1, but have not answered me on when 11.0.1 will be released, so I am attempting to "downgrade" from 11.0.0 to 9.0.7 on our secondary SBC.
- Check this link out BrianC614 , Ribbon actually provides a date of April 5th in the table that Microsoft plans to stop processing calls with the Replaces header:
https://support.sonus.net/display/ALLDOC/Service+Bulletin+for+Microsoft+Direct+Routing+Changes+in+Q1+and+Q2+2022+%28MC299923%2C+MC297438%2C+MC307310%2C+MC299922%29+for+EdgeMarc - My previous version was 9.0.6, so I unfortunately don't have 9.0.7 on my application partition. I am going to try downloading it now and putting it on my secondary SBC and forcing calls through it for testing, in case 9.0.7 works and 11.0.0 does not.