| Subcategory | Subject | URL |
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| 4.1 | Billing Support System (BSS) | https://knowledge.cinnox.com/kb/4.1-billing-support-system-bss |
| 4.1.1 | Billing Management | |
| 4.1.2 | Quality Analysis | |
| 4.1.3 | Credit Control | |
| 4.1.4 | Reporting | |
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| 4.2 | Operation Support System (OSS) | https://knowledge.cinnox.com/kb/4.2-operation-support-system-oss |
| 4.2.1 | Service Management | |
| 4.2.2 | Number Resource Management | |
| 4.2.3 | Package Management | |
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| 4.3 | Network Management System (NMS) | https://knowledge.cinnox.com/kb/4.3-network-management-system-oss |
| 4.3.1 | Real-time Status Monitoring | |
| 4.3.2 | Pro-active & Automated Testing | |
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| 4.4 | Customer Management System | https://knowledge.cinnox.com/kb/4.1-billing |
| 4.4.1 | Customer Profile | |
| 4.4.2 | Lead Management | |