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      Mitel PBX

      FQDN

      There are some models of Mitel PBX's that require our Metaswitch core switch IP to be configured/added to the FQDN list.

      When provisioning a Mitel PBX, please add 159.18.161.101 in addition to the other IP's referenced in our How SIP Trunking Works article for the proxy that your SIP trunk is configured for.