How to Implement SOC in a Telecom Company — 24/7 Network Monitoring

Why a telecom operator needs SOC

A telecom operator is critical national infrastructure. Attacks on operators threaten millions of subscribers, emergency services (112/911), and business communication. NIS2 requires continuous monitoring and incident reporting. But even without regulation — an operator without SOC cannot detect advanced attacks (APT, supply chain) or ensure service continuity. NOC (Network Operations Center) monitors availability but not cybersecurity — a dedicated SOC is needed.

Telecom SOC specifics

Massive monitoring scale

Millions of subscriber endpoints, thousands of network elements (routers, switches, base stations), dozens of BSS/OSS systems. Log volume: terabytes daily.

SOC-NOC integration

SOC and NOC must collaborate: SOC detects threats, NOC executes actions on infrastructure. Shared escalation and communication procedures.

Telecom protocol monitoring

SS7, Diameter, GTP, SIP, BGP — telecom-specific protocols requiring specialized tools and analyst expertise.

Subscriber data protection

Monitoring access to subscriber databases (HLR/HSS), detecting unauthorized location queries, SIM swapping detection.

Multi-level compliance

NIS2, national telecom law, GDPR, telecom regulator requirements — SOC must report to multiple regulators.

Internal vs external vs hybrid SOC

Internal SOC — control over critical infrastructure, deep network knowledge. Requires team of 15-30 analysts (24/7), own SIEM. Cost: $1.2-3.5M/year. For large operators.

SOC as a Service — faster deployment, lower entry threshold. Limitations: less knowledge of operator infrastructure, latency in escalation. For MVNOs and smaller ISPs.

Hybrid model — internal L1/L2 SOC monitoring network infrastructure, external L3 and threat hunting. Best option for mid-size operators and telco group companies.

Telecom SOC implementation plan

Phase 1 (month 1-3): Discovery and planning

• Log source inventory (core, RAN, transport, BSS/OSS, IT)
• Use case definition: DDoS, BGP anomalies, SIM swap, insider threat, APT
• SIEM architecture considering telco log volumes
• SOC-NOC integration planning

Phase 2 (month 4-8): Technical deployment

• Deploy SIEM (Splunk, Elastic, QRadar) with distributed architecture
• Log collectors on network elements
• Integration with telco systems: SS7 monitoring, BGP monitoring, DDoS detection
• Network Traffic Analysis (NTA) tools

Phase 3 (month 9-12): Operationalization

• Rule tuning, traffic baseline development
• IR playbooks for telco scenarios
• NOC process integration (escalation, remediation)
• Analyst training on telco protocols

Phase 4 (ongoing): Maturation

• Threat hunting on telco infrastructure
• SOAR automation
• Purple team exercises with telco-specific scenarios

Cybersecurity for Your Industry

Learn more about cybersecurity in your industry:

• Cybersecurity for Telecommunications

Best practices for implementation

Effective implementation requires several key steps:

1. Risk assessment and inventory — identify assets, threats, and vulnerabilities specific to your organization.
2. Policy development — document requirements, roles, and responsibilities.
3. Technical controls — deploy tools and configurations proportionate to identified risks.
4. Training and awareness — engage employees in protecting organizational security.
5. Monitoring and continuous improvement — regularly verify effectiveness and adapt to the evolving threat landscape.

Related topics

See also:

• NIS2 for hospitals — compliance
• EDR vs XDR vs NDR — comparison