# T7 chapter

Chapter notes for T7.

## Sources and go deeper

Checked links were opened this month. A confirm row has no address because that page was not opened.

- Wikipedia: [Webex (Wikipedia)](https://en.wikipedia.org/wiki/Webex) — last checked 2026-10
- Vendor doc: [Webex Help Center](https://help.webex.com/) — last checked 2026-10
- DevDocs: [Webex developer documentation](https://developer.webex.com/) — last checked 2026-10
- DevDocs: [Webex developer getting started](https://developer.webex.com/docs/getting-started) — last checked 2026-10
- Community: [Webex community](https://help.webex.com/community) — last checked 2026-10
- SRND: [Cisco Collaboration design zone](https://www.cisco.com/c/en/us/solutions/enterprise/design-zone-collaboration/index.html) — last checked 2026-10
- RFC: [RFC 3261 SIP: Session Initiation Protocol](https://www.rfc-editor.org/rfc/rfc3261) — last checked 2026-10
- Port table: [IANA service name and port number registry](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml) — last checked 2026-10
- Port table: [Port reference for Webex Calling](https://help.webex.com/article/b2exve) — last checked 2026-10
- RFC: [RFC 3263 Locating SIP Servers](https://www.rfc-editor.org/rfc/rfc3263) — last checked 2026-10
- RFC: [RFC 3264 An Offer/Answer Model with SDP](https://www.rfc-editor.org/rfc/rfc3264) — last checked 2026-10
- Wikipedia: [Session Initiation Protocol (Wikipedia)](https://en.wikipedia.org/wiki/Session_Initiation_Protocol) — last checked 2026-10
- RFC: [RFC 3550 RTP](https://www.rfc-editor.org/rfc/rfc3550) — last checked 2026-10
- RFC: [RFC 3711 SRTP](https://www.rfc-editor.org/rfc/rfc3711) — last checked 2026-10
- RFC: [RFC 4566 SDP](https://www.rfc-editor.org/rfc/rfc4566) — last checked 2026-10
- RFC: [RFC 4733 RTP payload for DTMF](https://www.rfc-editor.org/rfc/rfc4733) — last checked 2026-10
- Wikipedia: [Real-time Transport Protocol (Wikipedia)](https://en.wikipedia.org/wiki/Real-time_Transport_Protocol) — last checked 2026-10
- Release notes: [What's new in Webex Calling](https://help.webex.com/article/278bz2) — last checked 2026-10
- Vendor doc: [help.webex.com article jr1i3r](https://help.webex.com/article/jr1i3r) — last checked 2026-10
- Vendor doc: [help.webex.com article t9xctu](https://help.webex.com/article/t9xctu) — last checked 2026-10
- Vendor doc: [cisco.com document 211306](https://www.cisco.com/c/en/us/support/docs/voice/ip-telephony-voice-over-ip-voip/211306-In-Depth-Explanation-of-Cisco-IOS-and-IO.html) — last checked 2026-10
- Vendor doc: [help.webex.com article 2zx7fg](https://help.webex.com/article/2zx7fg) — last checked 2026-10
- Vendor doc: [cisco.com document 64020](https://www.cisco.com/c/en/us/support/docs/voice/call-routing-dial-plans/64020-number-voice-translation-profiles.html) — last checked 2026-10
- Vendor doc: [cisco.com CUBE dial-peer chapter](https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/voice/cube/ios-xe/config/ios-xe-book/m_cube-dp.html) — last checked 2026-10
- Vendor doc: [cisco.com Lumen Local Gateway PDF](https://www.cisco.com/c/dam/en/us/solutions/collateral/enterprise/unified-border-element-cube/connecting-cisco-webex-calling-to-lumen-sip-trunk-via-a-certificate-based-local-gateway-on-cisco-unified-border-element-cube-v14-5-ios-xe-17-8-1a.pdf) — last checked 2026-10
- RFC: [RFC 8446 TLS 1.3](https://www.rfc-editor.org/rfc/rfc8446) — last checked 2026-10
- Vendor doc: [help.webex.com article nt6eyxb](https://help.webex.com/article/nt6eyxb) — last checked 2026-10
- Vendor doc: [help.webex.com article w0qmeu](https://help.webex.com/article/w0qmeu) — last checked 2026-10
- Vendor doc: [help.webex.com article njwkamr](https://help.webex.com/article/njwkamr) — last checked 2026-10
- Vendor doc: [help.webex.com article n0xb944](https://help.webex.com/article/n0xb944) — last checked 2026-10
- Vendor doc: [help.webex.com article jwkbt2](https://help.webex.com/article/jwkbt2) — last checked 2026-10
- Vendor doc: [help.webex.com article ofrt6u](https://help.webex.com/article/ofrt6u) — last checked 2026-10
- Vendor doc: [help.webex.com article np2fdx](https://help.webex.com/article/np2fdx) — last checked 2026-10
- Vendor doc: [help.webex.com article o6rfjeb](https://help.webex.com/article/o6rfjeb) — last checked 2026-10
- Vendor doc: [help.webex.com article ubg5qd](https://help.webex.com/article/ubg5qd) — last checked 2026-10
- Vendor doc: [help.webex.com article nv7abhz](https://help.webex.com/article/nv7abhz) — last checked 2026-10
- Vendor doc: [help.webex.com article upg0eu](https://help.webex.com/article/upg0eu) — last checked 2026-10
- Vendor doc: [help.webex.com article 2dputx](https://help.webex.com/article/2dputx) — last checked 2026-10
- Vendor doc: [help.webex.com article frj1efb](https://help.webex.com/article/frj1efb) — last checked 2026-10
- Vendor doc: [help.webex.com article nvfbjts](https://help.webex.com/article/nvfbjts) — last checked 2026-10
- Vendor doc: [help.webex.com article nhvl4hw](https://help.webex.com/article/nhvl4hw) — last checked 2026-10

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