First find every critical dependency. Then choose the right migration.
Critical Line starts with the question that matters before any equipment decision: which critical systems still depend on the lines you are about to change?
How Critical Line works.
First find every critical dependency. Then choose the right migration.
Remove unnecessary lines, migrate the necessary ones, and know why each one exists.
Determine the actual endpoint, jurisdiction and requirements before making a compliance claim.
Know where the change is happening and whether your properties are exposed.
Manage the entire critical-line portfolio, including lines you have not migrated yet.
Discovery is the beginning. Assessment, carrier intelligence, migration and monitoring complete the lifecycle.
“Replacement” is one of four outcomes.
After Discovery and Assessment, each line gets a deliberate disposition. Many lines can simply be removed. Some belong on modern native services. Some critical legacy endpoints are best preserved on managed connectivity. That is Cline by Critical Line.
The point is that the disposition is chosen per line, per endpoint, per jurisdiction, never assumed.
Start with what you have.
An address, a bill or a carrier notice. Any of the three works.