How Telecom Billing Works
A comprehensive guide to the telecom billing process—from CDR generation to cash collection. Understand the systems that turn network usage into revenue.
The Billing Pipeline
From network event to customer payment—each step in the telecom billing process.
CDR Generation
Every phone call, text message, or data session generates a Call Detail Record (CDR) at the network switch level. These raw records capture the fundamental details of each communication event.
Key Components
- Originating phone number (A-number)
- Destination phone number (B-number)
- Call start time and date
- Call duration in seconds
- Call type (local, long distance, international, toll-free)
- Trunk group and route information
- Disconnect reason codes
- Network element identifiers
CDR Collection & Ingestion
CDRs must be collected from switches and transported to the billing system. Most commonly, this happens via secure file transfer—you send us your CDR files and we handle the rest.
Key Components
- Secure FTP/SFTP file upload
- Automated file polling and processing
- Multiple format support (CSV, fixed-width, XML, proprietary)
- File acknowledgment and archival
- Sequence tracking and gap detection
Mediation
Mediation is the process of transforming raw switch data into a standardized format suitable for rating. This is where disparate data sources become unified billing records.
Key Components
- Format normalization (converting all sources to common format)
- Field mapping and translation
- Number normalization (E.164 formatting)
- Duplicate detection and removal
- Record validation and error flagging
- Data enrichment (adding carrier codes, rate centers, jurisdictions)
- Correlation of partial records
- Filtering of non-billable events
Rating
Rating is the core billing function—taking mediated records and calculating charges based on rate plans, tariffs, and contractual agreements. This is where usage becomes revenue.
Key Components
- Jurisdiction determination (interstate, intrastate, local)
- Rate plan selection based on customer agreement
- Time-of-day rating (peak, off-peak, weekend)
- Tiered and volume-based pricing
- Minimum call duration rules
- Rounding rules (6-second, 1-minute increments)
- Surcharges and fees application
- Tax jurisdiction determination
Tax Calculation
Telecom services are subject to complex, multi-jurisdictional taxation. Federal, state, and local taxes must be calculated correctly to avoid compliance issues and audits.
Key Components
- Federal Universal Service Fund (USF)
- State and local sales taxes
- E911 surcharges
- Telecommunications relay service fees
- PUC/PSC regulatory fees
- Municipal franchise fees
- Federal Excise Tax (where applicable)
Invoice Generation
Rated and taxed records are aggregated into customer invoices. Modern billing requires flexible presentment options to meet diverse customer needs.
Key Components
- Summary and detailed invoice formats
- PDF generation for print and email
- Electronic billing (EBPP) integration
- Custom branding and white-labeling
- Multi-format export (EDI, CSV, XML)
- Consolidated billing for multi-location customers
- Usage detail on demand
Accounts Receivable
Billing doesn't end at invoice generation. Managing receivables, processing payments, and handling collections are essential to cash flow.
Key Components
- Payment processing (ACH, credit card, check)
- Payment posting and reconciliation
- Aging reports and collections workflows
- Dunning letter generation
- Write-off management
- Customer credit management
- Payment plan administration
Customer Support
The billing cycle continues after invoices are sent. Customers have questions about their bills, need access to usage details, and expect self-service options. Supporting them efficiently is part of the billing operation.
Key Components
- Customer portal for self-service access
- Usage and call detail viewing
- Invoice and statement downloads
- Payment history and account status
- Dispute resolution and adjustments
- Billing inquiry support
- Account management tools
Ready to Optimize Your Billing?
Our team has decades of telecom billing experience. We're happy to discuss your specific situation and requirements.
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