T11 · T11-R31 · Migration paths
A migration habit that does not invent a cutover
Study migrations as a reversible change to one number. Save the old route, test the new route, and keep a way back. That habit is how you avoid a one-way Saturday. It is not a quote from a Zoom or Avaya runbook, because those runbooks were not opened.
Learn it in 5 minutes
- Avaya's own line says to use AI to understand existing workflows and move to Infinity faster.
- Faster is not a date.
- SIP trunking splits a private domain and a public domain.
- A number can be moved only when you can name the domain that owns it.
- Rollback is the path back to the domain you saved. This lab does not claim a vendor button for it.
Visual
Count the boxes: 4. Each label is a name from a page or a study label marked on the drawing.
Flow
What is going on
Study migrations as a reversible change to one number. Save the old route, test the new route, and keep a way back. That habit is how you avoid a one-way Saturday. It is not a quote from a Zoom or Avaya runbook, because those runbooks were not opened.
The private domain, in the SIP trunking article, is the PBX side. The public domain is the path toward the telephone network. Moving a contact center without deciding which domain owns the number is how calls land on the old platform.
Dual-run means both paths exist during a test. Confirm the feature name on the product. This lab uses dual-run as a study word.
Worked example
Pick one imaginary study number and label it sample, not a real customer number. Write old domain, new domain, test, and rollback. Cite the trunk article for the domains and the Infinity line only for Avaya's direction of travel.
Quiz
1. The Avaya modernization line includes a calendar date.
False. It says faster. It does not list a date.
2. SIP trunking, on the Wikipedia page, separates a private domain and a public domain.
True. That split is in the article that opened.
Ecosystem
Sister pieces sit on the ecosystem page: the glossary, the mind map, the integration map, and the bridges.
- Private domain — The PBX or UC side in the SIP trunking article.
- Rollback — Returning a number to the path you saved. Confirm the product button.
Config. Write the number's current domain before you write the target product.
Troubleshooting. If the test number still rings the old agent, the public domain may still point at the old private domain. Check that hop before you rebuild the queue.
Bridge. CUCM and UCCE are common old domains. Their Cisco pages did not open in this session.
Mind map, sister technologies, and future hooks live on the ecosystem page.
Sources and go deeper
Opened 2026-10. A row marked confirm has no link, because that page was not verified.
- Avaya. Avaya Infinity platform last checked 2026-10
- Wikipedia. SIP trunking last checked 2026-10
- RFC. RFC 3261, SIP last checked 2026-10
- Confirm. Vendor migration runbook. confirm. Not opened. last checked 2026-10
- Confirm. Product name of the rollback button. confirm. last checked 2026-10