Evidence before the change

Sources and go deeper

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

• Cisco. System Configuration Guide for CUCM, Release 15 last checked 2026-10
• RFC. RFC 3261, SIP last checked 2026-10
• Community. Cisco Community, Collaboration knowledge base last checked 2026-10
• Wikipedia. Session Initiation Protocol (Wikipedia) last checked 2026-10
• Protocol and ports. CUCM 15 TCP and UDP port usage last checked 2026-10

sources.json Markdown