Once the brand has been registered and approved, each campaign needs to be registered as well. The carriers will then allocate throughput instantly with the campaign ID and brand ID. These throughput rates are not fixed, and are determined by carriers based on the business and use case.
For example, notifications or transactional SMS may be assigned higher throughput rates (2FA and OTP), and marketing campaigns may be assigned lower throughput rates. This is assessed on a case-by-case basis and is up to the discretion of carriers.