Microsoft have a handful of destinations your SBCs must be able to reach over the internet.

Your SBC must be able to reach the following IPs on target port 5061/tcp

  • 52.114.148.0
  • 52.114.132.46
  • 52.114.75.24
  • 52.114.76.76
  • 52.114.7.24
  • 52.114.14.70

They must also be able to connect media ports to 52.112.0.0/14 on 49152:53247/udp

In the same manner, Microsoft must be able to reach your SBC SIP Signalling Port and Media Ports you define on your SBC

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