FQDN support for voice calls

Support FQDN-based inbound call authorization and outbound call delivery in PortaSwitch, reducing manual IP address maintenance and preserving the destination FQDN in outgoing SIP INVITEs.

When CSP's customers use cloud-based platforms like Genesys Cloud or Twilio, these platforms assign unique FQDNs for each customer's call center. Cloud providers frequently rotate and update their underlying IP addresses to maintain their infrastructure, often without notifying. Under the current static IP system, when these IPs change, call authorization of incoming calls to PortaSwitch immediately fails because there is no matching record.

For outbound delivery, the requesting CSP currently uses a workaround - an SBC to resolve the destination FQDN and send calls with the customer-specific domain in the SIP Request-URI. The CSP wants PortaSwitch to handle this directly.

• Reduced operational costs: Less manual work to monitor, verify, and update customers' IP addresses.
• Improved service reliability: Fewer inbound call failures caused by changes in third-party platforms' IP addresses.
• Better scalability: Supporting customers with dynamically changing IP addresses becomes easier without increasing manual administration as the customer base grows.
• More attractive service offering: PortaSwitch can support modern cloud-based communication platforms without requiring customers to maintain static IP allowlists.