DSS Call Routing Errors
Call routing for all DSS services was broken this morning at 7:02 AM for SIP Trunks and Webex Calling.
We have since identified the issue and have deployed a fix.
As of 9:05 AM calls are being correctly routed but we are keeping the services monitored.
Post Mortem
Affected Services:
Service | Impact |
|---|---|
DSS | MAJOR |
Affected Products:
Product | Impact |
|---|---|
SIP Trunk | MAJOR |
Webex Calling | PARTIAL |
Start Date of Incident:
08/01/2025 07:02 CET
Resolution Date of Incident:
08/01/2025 09:05 CET
Summary of Incident:
Calls were not being correctly routed by the platform causing errors for both inbound and outbound calls.
The cause was a bug in a specific software version of the RTP Server that caused an OOM error.
Mitigation Steps:
Restarted the affected services
Resolution Steps:
Update the RTP Server to permanently fix the issue
Action Items:
Improve our alerting system so that in the future we can take proactive action in similar cases
Change SIP Server responses to SIP OPTION so that in similar cases customer endpoints will be able to correctly fail-over to the secondary node
- Started
- Ended
- Duration
- 2 h 3 min
- Affected services
- Registration, IP, Webex Calling