Zones, not one ACL

Sources and go deeper

Opened 2026-10. A row marked confirm has no link, because that page was not verified.

Protocol and ports. Cisco Expressway IP port usage (X14.3 and X15.0) last checked 2026-10
RFC. RFC 3550, RTP last checked 2026-10
RFC. RFC 8445, ICE last checked 2026-10
Cisco. Cisco Expressway Series product support last checked 2026-10
Protocol and ports. IANA service names and port numbers last checked 2026-10
Community. Cisco Community, Collaboration knowledge base last checked 2026-10
Wikipedia. Real-time Transport Protocol (Wikipedia) last checked 2026-10