Kamailio Consulting
Kamailio sits at the edge where scale, security and NAT all meet. Zypager designs and troubleshoots routing, registrar, dispatcher and RTPengine integration with topology hiding and anti-flood.
Problems solved
- Complex or unpredictable SIP routing
- Registrar / location issues
- Load balancing & failover gaps
- NAT traversal problems
- Exposure and flooding risk
How Zypager helps
- Design clear routing logic (incl. KEMI/Lua)
- Configure registrar, location and dispatcher
- Integrate RTPengine for media
- Add topology hiding, anti-flood and tracing
Technical areas covered
Typical deliverables
- Routing design / review
- Security & NAT recommendations
- Tracing & observability setup
Frequently asked questions
Yes. One-way and no-audio problems are usually in the RTP media path or NAT/SDP handling rather than the signalling. With a SIP trace and the SDP from each leg, the media direction can be followed to the point where it stops.
Yes — Asterisk, FreeSWITCH, Kamailio, OpenSIPS and RTPengine. Many real systems combine them (edge proxy, media relay and application logic), and problems often live at the boundaries between them.
WebRTC-related work may be reviewed separately where it is directly connected to Asterisk, Kamailio, RTPengine or SIP troubleshooting, but it is not currently offered as a standard fixed-price service.
Reading traces is central to how Zypager works. A clear pcap, sngrep or Homer export, plus call details, is often enough to identify the failing transaction without live access.
Yes, on an hourly basis for urgent incidents — failed inbound/outbound calls, RTP/no-audio and carrier problems. Final scope and availability depend on access and complexity.
Related services
OpenSIPS Consulting
High-availability SIP routing, trunking and carrier integration.
RTPengine Consulting
Media relay and SRTP/RTP bridging that actually carries audio.
Asterisk + Kamailio + RTPengine Deployment
A full voice stack — edge, media and application — built and documented.
Not sure which service you need?
Send the symptoms and a call example. The right starting point becomes obvious from the trace.