Sources and go deeper
Opened 2026-10. A row marked confirm has no link, because that page was not verified.
- RFC. RFC 3261, SIP last checked 2026-10
- RFC. RFC 3264, offer/answer last checked 2026-10
- RFC. RFC 3550, RTP last checked 2026-10
- RFC. RFC 4566, SDP last checked 2026-10
- RFC. RFC 3711, SRTP last checked 2026-10
- Cisco. Cisco Unified Communications Manager product support last checked 2026-10
- Cisco. System Configuration Guide for CUCM, Release 15 last checked 2026-10
- Cisco. Cisco Collaboration Preferred Architectures last checked 2026-10
- Cisco. Preferred Architecture for Cisco Collaboration 15, design overview (PDF) last checked 2026-10
- Cisco. Cisco Unified Border Element product support last checked 2026-10
- Protocol and ports. CUCM 15 TCP and UDP port usage last checked 2026-10
- Protocol and ports. Cisco Expressway IP port usage (X14.3 and X15.0) last checked 2026-10
- Protocol and ports. Port reference for Webex Calling last checked 2026-10
- Protocol and ports. IANA SIP parameters last checked 2026-10
- Protocol and ports. IANA RTP parameters 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. Session Initiation Protocol (Wikipedia) last checked 2026-10
- Wikipedia. Real-time Transport Protocol (Wikipedia) last checked 2026-10
- Wikipedia. Session Description Protocol (Wikipedia) last checked 2026-10
- Wikipedia. Voice over IP (Wikipedia) last checked 2026-10
- Cisco. Collaboration 12 SRND book. confirm. The historical Collaboration 12 SRND path opened as a product listing, not the design book. Use the Preferred Architecture index, which was opened. last checked 2026-10
- Cisco. Enterprise QoS SRND book. confirm. The Enterprise QoS SRND path returned HTTP 404. last checked 2026-10
- Wikipedia. English Wikipedia article for Cisco Unified Communications Manager. confirm. That title returned HTTP 404. The CUCM disambiguation page is the Wikipedia page that opened. last checked 2026-10
sources.json Markdown