VoIP Platforms
Understanding VoIP platforms, analysing SIP flows and mastering IP telephony architectures
VoIP platforms and their challenges
IP telephony relies on open protocols (SIP, RTP, SRTP) that traverse enterprise and Internet IP networks. Understanding how these platforms work, analysing SIP flows and diagnosing interoperability issues are essential skills to guarantee the reliability and quality of communications.
Risks and threats
Toll fraud
Unauthorized use of telephony resources, international call hijacking, overbilling. Unprotected VoIP systems are prime targets for large-scale fraud.
Eavesdropping
Unencrypted SIP and RTP flows can be captured on the network. Without TLS for signaling and SRTP for media, any conversation can be intercepted.
Denial of service
SIP servers exposed to the Internet are vulnerable to DoS and DDoS attacks. An abnormal volume of INVITE, REGISTER or OPTIONS requests can saturate the infrastructure and disrupt phone service.
Identity spoofing
The SIP protocol does not natively provide strong authentication. Without controls, an attacker can forge caller identities and compromise trust in communications.
Key SBC functions
SIP session control
The SBC controls the establishment, maintenance and release of SIP sessions. It authenticates devices, limits concurrent sessions and enforces routing policies.
Protocol normalization
The SBC ensures interoperability between equipment from different vendors by normalizing SIP variants, adapting codecs and transforming signaling.
Topology hiding
Concealment of the internal voice network structure. The SBC rewrites SIP headers and SDP information to reveal nothing about the internal infrastructure.
Interconnection protection
At interconnection points with carriers and partners, the SBC filters flows, detects anomalies, enforces rate limits and protects the infrastructure against abuse and attacks.
The Bill-IT approach
We analyse your existing VoIP platforms, study SIP flows and design SBC configurations tailored to your constraints. Our approach covers the entire chain: from SIP signaling analysis to interoperability diagnostics, from SBC configuration to architecture optimization.