VoIP & Telecom
Session Border Controllers
SBC edge design for topology hiding, SIP normalization, security, and interconnect mediation.
An SBC is the controlled front door for SIP traffic. We design and configure SBC edges for topology hiding, protocol normalization, DoS resistance, and clean handoff to internal proxies and media servers—whether you use a commercial SBC or an open-source edge pattern built around Kamailio/OpenSIPS and media relays.
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Who it’s for
- • Carriers and enterprises exposing SIP to the internet
- • Platforms onboarding many customer interconnects
- • Teams needing clearer demarcation between trust zones
Problems we address
- • Internal SIP topology is visible or easily probed
- • Interconnects need normalization that the core should not own
- • Attack and flood traffic reaches softswitch cores
Expected outcomes
- • Edge trust-zone design with topology hiding
- • Normalization and policy at the border
- • Rate controls and monitoring at the SBC layer
Capabilities
Concrete engineering capabilities included in a typical engagement for this service.
SBC architecture and capacity planning
SIP normalization and header policy
TLS/SRTP edge patterns
Interconnect onboarding playbooks
Edge metrics and alerting
Technology
Representative technologies used for this service. Final stack depends on your estate.
- Commercial SBC platforms
- Kamailio
- OpenSIPS
- RTPengine
- TLS/SRTP
- SIP
- Linux
Architecture
Voice signalling path
Users and carriers meet through SBC, SIP proxy, and media services.
Deliverables
- • SBC architecture document
- • Configured edge policies as scoped
- • Interconnect test checklist
- • Security baseline notes
- • Ops runbook
Out of scope
- • Appliance hardware purchasing
Timeline
Typical timeline
2–6 weeks
Timeline depends on scope, access, and dependencies—not a delivery guarantee.
Process
A clear delivery path from discovery through handover and optional support.
01
Discovery
Goals, constraints, success criteria, and current-state review.
02
Architecture
Target design, interfaces, risks, and delivery sequence.
03
Implementation
Incremental build with visible progress and documented decisions.
04
Testing
Functional checks, failure paths, and acceptance criteria validation.
05
Deployment
Controlled release to staging and production with rollback paths.
06
Handover
Runbooks, access notes, and operator/admin walkthrough.
07
Support
Optional hypercare window or retainer continuity after go-live.
Custom engagement
Pricing depends on architecture, traffic profile, and integration depth. Share your requirements for a scoped quote.
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Related work
Example / concept projects shown for illustration unless otherwise verified.
FAQ
Not always. For some estates an open-source edge pattern is enough; for others a commercial SBC is the right demarcation. We recommend based on interconnect count, compliance, and ops model.
Ready to build?
Tell us about your environment, constraints, and target outcomes. We’ll recommend a package or a scoped quote.