About this task
Topology Hiding masks the FQDN or IP address portion of SIP headers. For example, SBC@avaya.com can become SBC@135.122.18.7, or just the opposite. Though changing the headers can mask the internal topology, the headers can be adapted into the format that the recipient requires. All SIP Service Providers require the domain to be expressed as an IP address, but some connections can use an FQDN.