SS7 Protocol Overview¶

Signaling System No. 7 (SS7) is a critical protocol suite used in telecommunications networks for signaling and control. This document outlines our SS7 protocol implementation and its various components.

Protocol Stack Components¶

MAP (Mobile Application Part)¶

• Location management
• Authentication
• SMS operations
• Detailed MAP Documentation

TCAP (Transaction Capabilities Application Part)¶

• Transaction handling
• Dialogue management
• Component sublayer
• Detailed TCAP Documentation

SCCP (Signaling Connection Control Part)¶

• Connection-oriented services
• Connectionless services
• Global title translation
• Detailed SCCP Documentation

Key Features¶

Reliability¶

• Automatic failover
• Load sharing
• Error handling
• Message sequencing

Security¶

• Access control
• Message filtering
• Fraud detection
• Security logging

Monitoring¶

• Real-time monitoring
• Performance metrics
• Error tracking
• Traffic analysis

Implementation Guide¶

Basic Setup¶

import { SS7Client } from '@telco-api/ss7';

const client = new SS7Client({
  pointCode: '1-1-1',
  networkIndicator: 'international',
  routingIndicator: 'gt',
  globalTitle: {
    tt: 0,
    np: 1,
    nai: 4,
    address: '12345'
  }
});

await client.connect();

Example: Send MAP Operation¶

const response = await client.map.sendRoutingInfoForSM({
  msisdn: '1234567890',
  serviceCenter: {
    tt: 0,
    np: 1,
    nai: 4,
    address: '987654321'
  }
});

Use Cases¶

Mobile Network Operations¶

• Location updates
• Authentication
• SMS routing
• USSD handling

Roaming Services¶

• Location management
• Service provisioning
• Billing operations
• Fraud prevention

Network Management¶

• Traffic monitoring
• Performance analysis
• Error handling
• Network optimization

Best Practices¶

1. Message Handling
2. Implement proper timeout mechanisms
3. Handle message sequencing
4. Manage transaction states

5. Process acknowledgments

6. Error Management

7. Handle protocol errors
8. Implement retry mechanisms
9. Log error conditions

10. Monitor error rates

11. Performance Optimization

12. Connection pooling
13. Message buffering
14. Load balancing

15. Resource management

16. Security Measures

17. Access control lists
18. Message filtering
19. Fraud detection
20. Security auditing

Advanced Topics¶

Global Title Translation¶

Detailed guide on implementing and managing GTT.

Load Balancing¶

Strategies for distributing SS7 traffic across multiple nodes.

Redundancy Setup¶

Implementation guide for redundant SS7 links.

Monitoring & Troubleshooting¶

Key Metrics¶

• Message throughput
• Response times
• Error rates
• Link status

Common Issues¶

• Connection failures
• Timeout issues
• Routing problems
• Protocol errors

Debugging Tools¶

• Protocol analyzers
• Log analysis
• Performance monitoring
• Traffic tracing

Reference¶

Related Documentation¶

• INAP Documentation
• CAMEL Documentation
• Examples

Standards Compliance¶

• ITU-T Q.700 Series (SS7)
• 3GPP TS 29.002 (MAP)
• ITU-T Q.770 Series (TCAP)
• ITU-T Q.710 Series (SCCP)

Support¶

For SS7 protocol support: - Technical Support: support@telco-sec.com - Emergency Support: +1-XXX-XXX-XXXX