SIP trunking can connect a compatible phone platform to public telephone numbers and calling services. The migration needs more than a channel count.
Document the current estate
- Main numbers and DDI ranges
- Current provider and account details
- Installation addresses
- Call routing and out-of-hours rules
- Emergency calling information
- Analogue, alarm or lift-line dependencies
Control the port
Validate the data, test the new platform and agree a migration and rollback plan. Porting dates depend on provider acceptance and should not be represented as guaranteed until confirmed.
UKDDI can provide new UK business numbers, while 39T can help plan SIP trunking and a controlled migration.