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Addresses for premises-based carrier devices/services under BYOC Cloud

You will need to make sure that your carrier allows traffic from these addresses. 

If you are using a third-party premises-based carrier or PBX device/service, then you need to make sure that connectivity to these addresses is allowed.

Note: Media traffic on BYOC Cloud telephony connections is carried over a dedicated CIDR Range. For more information, see Cloud media services CIDR IP address range.