Voice
Telecom
Telephone voice numbers and their separate SMS registration requirements.
Telecom Voice uses reserved telephone numbers. Buying or reserving a toll-free number and using it for calls does not
verify it for outbound SMS.
An eligible number can be shared by Voice and SMS. Review the
SMS registration guide for number-specific toll-free verification and the separate
Brand, Campaign, and sender-enrollment requirements for US local numbers. Releasing a shared number affects both uses.
Detailed Voice configuration documentation is WIP.