# Migration cutover

Migration cutover Calling moves and contact-center moves use different tools. This is a study checklist, not a change window. Item What to remember Source Calling from Unified CM Prepare, migrate devices and features, Migration Insights. nbedetf and the rooms in T6 BroadWorks / BroadCloud Separate article from Unified CM. n1ku0vfb Contact center CCX discovery tool is not a UCCE import. T6-R04 Numbers Port orders, FOC, then test. 933 before agents take live emergency calls. T6-R06 Rollback Know which system still owns the number before you power anything off. T6-R01 Back to the lab

## 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 nbedetf](https://help.webex.com/article/nbedetf) — last checked 2026-10
- Vendor doc: [help.webex.com article t9xctu](https://help.webex.com/article/t9xctu) — 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 utqcm7](https://help.webex.com/article/utqcm7) — last checked 2026-10
- Vendor doc: [help.webex.com article nb2ve0e](https://help.webex.com/article/nb2ve0e) — 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 5h5d8ab](https://help.webex.com/article/5h5d8ab) — last checked 2026-10
- Vendor doc: [help.webex.com article nhvl4hw](https://help.webex.com/article/nhvl4hw) — last checked 2026-10
- Vendor doc: [help.webex.com article mwjlgk](https://help.webex.com/article/mwjlgk) — last checked 2026-10
- Vendor doc: [help.webex.com article py6u9h](https://help.webex.com/article/py6u9h) — last checked 2026-10
- Vendor doc: [help.webex.com article tajemk](https://help.webex.com/article/tajemk) — last checked 2026-10
- Vendor doc: [help.webex.com article n1lsqvu](https://help.webex.com/article/n1lsqvu) — last checked 2026-10
- Vendor doc: [help.webex.com article s0qro1](https://help.webex.com/article/s0qro1) — last checked 2026-10
- Vendor doc: [help.webex.com article n6gaghu](https://help.webex.com/article/n6gaghu) — last checked 2026-10
- Vendor doc: [help.webex.com article n0l9q2z](https://help.webex.com/article/n0l9q2z) — last checked 2026-10
- Vendor doc: [help.webex.com article 4yz2zd](https://help.webex.com/article/4yz2zd) — last checked 2026-10
- Vendor doc: [help.webex.com article nw9po3o](https://help.webex.com/article/nw9po3o) — last checked 2026-10
- Vendor doc: [help.webex.com article q0pgpb](https://help.webex.com/article/q0pgpb) — last checked 2026-10
- Vendor doc: [help.webex.com article x974bd](https://help.webex.com/article/x974bd) — last checked 2026-10
- Vendor doc: [help.webex.com article d2lemv](https://help.webex.com/article/d2lemv) — last checked 2026-10
- Vendor doc: [help.webex.com article n19c71](https://help.webex.com/article/n19c71) — last checked 2026-10
- Vendor doc: [help.webex.com article 32gfts](https://help.webex.com/article/32gfts) — last checked 2026-10
- Vendor doc: [help.webex.com article n1ku0vfb](https://help.webex.com/article/n1ku0vfb) — last checked 2026-10
- Vendor doc: [cisco.com CUCM 12.5(1) troubleshooting, dial plans](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/trouble/12_5_1/cucm_b_troubleshooting-guide-1251/cucm_b_troubleshooting-guide-1251_chapter_0101.html) — last checked 2026-10

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