Kamailio consultancy and support
Design, build, tuning and 24/7 support for the SIP server at the core of your network.
24/7 emergency support for production platforms.
Kamailio handles the signalling at the heart of a lot of telecoms platforms. We've been installing, configuring and customising it since around 2005, and we've worked in telecoms since 1999, so we know the software and the network it sits in.
A new routing layer, a config that misbehaves under load, an OpenSIPS estate you'd like to move, or just a second pair of eyes on what you've built: you'll be dealing directly with the engineer doing the work.
Kamailio: what's in the toolbox
Config review
We go through your kamailio.cfg line by line and fix what will fail under load: routing logic, timers, shared-memory sizing.
Custom routing
Least-cost and per-customer routing, number lookups and policy, plus module development when the config language runs out.
Integration
Kamailio alongside FreeSWITCH, carriers, billing and provisioning systems.
Fault-finding
We read the SIP traces, find the root cause and tell you in plain English what broke and why.
High availability
Load balancing, failover and dispatcher setups that survive a node going down.
OpenSIPS to Kamailio
Planned migrations from OpenSIPS with no downtime.
Microsoft Teams
Direct Routing integration for a single communication experience across the business.
Typical engagements
- Emergency call-out for a Kamailio platform that's down or degraded.
- Health check and config review of an existing deployment, with a written report.
- Design and build of a new SIP edge: registrar, proxy, load balancing, NAT handling, TLS/WSS.
- Upgrades between major Kamailio versions with a tested rollback plan.
- Fraud and abuse protection: rate limiting, pike, geo/IP policy, fail2ban integration.
- A 24/7 support contract so there's always an engineer who knows your platform.
Kamailio support: common questions
How much does Kamailio support cost?
Consultancy, implementation and support are £100 an hour and emergency troubleshooting is £120 an hour. For guaranteed 24/7 cover, support contracts are priced on application. See the pricing page.
Our Kamailio platform is down. Can you help now?
Yes, 24/7. Call +44 161 820 1210 and you'll speak to an engineer who has run Kamailio in production since 2005, not a call centre.
Do you work with companies outside the UK?
Yes. We're UK-based and work remotely with customers internationally.
Who actually works on our platform?
One of the three of us. We don't hand work to juniors or subcontractors, and you talk directly to the engineer doing it.
Can you migrate us from OpenSIPS to Kamailio?
Yes. We plan OpenSIPS to Kamailio migrations so they go live without downtime, with a tested rollback.
Do you support Kamailio alongside FreeSWITCH, RTPEngine and Microsoft Teams?
Yes. Most platforms we look after pair Kamailio with FreeSWITCH for media, RTPEngine for NAT and media relay, and some with Microsoft Teams Direct Routing.
Fixing it yourself?
Our guides to the Kamailio problems we see most, with config for 5.7 and 5.8.
- Kamailio REGISTER stuck in a 401 Unauthorized loop
- One-way audio through Kamailio and rtpengine
- Kamailio dispatcher not failing over to the next destination
- Kamailio running out of shared memory (shm)
- Kamailio TLS handshake failed
- WebRTC / SIP over WebSocket registration fails in Kamailio
- friendly-scanner and SIP brute-force attacks hitting Kamailio
- Kamailio won't start after upgrading from 5.7 to 5.8
- Kamailio MySQL errors: server has gone away, too many connections
- Kamailio in front of Asterisk or FreePBX: calls and registrations failing
Kamailio down? Call now.
24/7, an engineer who has run Kamailio in production since 2005 answers the phone. Call if you're seeing any of these:
- Registrations failing or phones dropping offline
- Calls not routing, one-way audio or wrong caller ID
- Dispatcher, load balancer or failover not behaving
- High CPU, memory or shared-memory exhaustion under load
- TLS certificate, WebSocket or WebRTC problems
- SIP scanners, brute force or toll-fraud traffic
- An upgrade or config change that's gone wrong
- Database, htable or rtpengine errors in the logs
Talk to an engineer
Production platform down? Call us. We answer 24/7. Everything else gets a reply from one of the three of us within 24 hours.
Get in touch directly
No ticket queue, no account manager. You reach the engineer.
- Phone+44 161 820 1210
- Email[email protected]
- Hours24/7 by phone for production emergencies. Other enquiries answered within 24 hours.
- ConfidentialityWe'll sign your NDA before you share configs or call data.
- LinkedInKamailio Support