RTPengine Consulting
RTPengine is where media problems are won or lost. Zypager configures relay, SRTP/RTP bridging, SDP rewriting and NAT handling and integrates it cleanly with Kamailio or OpenSIPS.
Problems solved
- One-way / no audio across the relay
- SRTP / RTP bridging failures
- ICE / STUN / TURN issues
- SDP rewriting problems
- Docker / Linux deployment problems
How Zypager helps
- Configure relay and media direction
- Bridge SRTP/DTLS to RTP
- Correct SDP rewriting and NAT handling
- Plan kernel / Docker deployment
Technical areas covered
Typical deliverables
- Media-path configuration review
- One-way-audio diagnosis
- Deployment recommendations
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
RTP / No-Audio Troubleshooting
One-way audio and no audio, separated from signalling.
Kamailio Consulting
SIP edge routing, registrar and dispatcher built to scale.
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.