South Africa: Session Border Controller (12 month contract) posted by Greys Recruitment
Posted on 2025-06-18 00:00:00
| Employer | Greys Recruitment |
|---|---|
| Category | Telecommunication |
| Location | South Africa / South Africa |
Job Summary
Sandton, Johannesburg
Requirements:
- Minimum 10 years’ experience
- Expertise in quality of service (QoS), traffic shaping, and SIP trunking
- Understanding of network infrastructure, including IP routing, firewalls, and load balancers
- Experience with network tools for monitoring and troubleshooting (Wireshark etc.)
- Familiarity with SBC vendors such as Cisco, Oracle, AudioCodes, Ribbon Communications, or Acme Packet
- Knowledge of security protocols (TLS, SRTP, IPsec, etc.)
- Proficiency in VoIP protocols (SIP, RTP, etc.) and SBC-specific technologies
Responsibilities:
Configuration and Deployment
- Install, configure, and deploy SBCs in VoIP and UC environments
- Ensure that the SBC is properly integrated with the existing network infrastructure, including SIP servers, gateways, firewalls, and other telecom equipment
- Apply necessary software patches, updates, and license management to keep the SBC secure and functional.
Security Management - Ensure secure communication by enabling encryption protocols such as TLS for signaling and SRTP for media streams. Configure firewall traversal mechanisms
- Implement security policies that protect against attacks like DoS and DDoS and ensure session integrity
- Implement access control policies to prevent unauthorized access to the network and its services
Quality of Service (QoS) and Traffic Management
- Configure the SBC to manage and optimise traffic flows, ensuring that voice and video quality meet expected standards
- Implement load balancing across multiple servers or SBCs to prevent network congestion and maintain service reliability
- Ensure effective routing of calls across various networks (e.g., internal VoIP networks, external carriers, etc.), optimising for both quality and cost
Troubleshooting and Support
- Diagnose and resolve issues related to call failures, quality degradation (jitter, packet loss, latency), and connectivity problems
- Utilise SBC logging and monitoring tools to trace and analyse call signaling and media flows, identifying bottlenecks or security threats
- Continuously monitor SBC performance, ensuring that thresholds for critical parameters (like CPU, memory, and traffic load) are not exceeded
Interoperability Testing:
- Ensure that the SBC interoperates correctly with various equipment from different vendors, such as SIP servers, gateways, and PBXs
- Test and validate support for various protocols and codecs (SIP, H.323, WebRTC, etc.), ensuring compatibility and optimal performance
- Documentation and Compliance:
-Maintain accurate records of SBC configurations, network topology, troubleshooting steps, and changes made to the system
Ensure that SBC configurations adhere to industry standards, security policies, and regulatory requirements - Collaboration and Knowledge Sharing:
- Work closely with network and firewall engineers, system administrators, and telecom teams to ensure the SBC is aligned with the overall network design
How to apply:
- Follow the link to our jobseeker’s page www.********.co.za
- Search for the job title: Session Border Controller
- Click apply to submit your CV.
Click Go Apply to apply online!
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