CPaaS

1. Communication services

1.1. Voice

1.2. SMS

1.3. Numbers

1.4. Chat

1.5. Video

1.6. Mail

1.7. Turnkey services

2. Other business requirements

2.1. Customers and users

2.2. Order and billing

2.3. Digital journey

2.4. Reporting

2.5. Support

3. Non-functional requirements

3.1. Security, regulation

3.2. Reliability, performance

3.3. Technical environment

3.4. Integration and delivery

3.5. Monitoring