Sipfront ❤️ Hepic

If your automated test runs pass, all is good. But what if they fail, and even more so, if they fail sporadically and non-reproducibly? A case for monitoring and observability platforms Passive monitoring solutions are great tools for Telco operators to retrospectively troubleshoot call scenarios. If a particular customer raises a ticket about failed calls, you can quickly and easily drill down into the call flows, bits and bytes of the involved SIP messages, to uncover the reason for the issues. Read more →

STIR/SHAKEN to fight robo-calls - Authorizing Caller Ids

Robocalling, or the automated generation of calls - combined with spoofed caller ids (calling party numbers) - is illegal in most of the countries, but is still rising especially in the US. STIR (Secure Telephony Identity Revisited) and SHAKEN (Secure Handling of Asserted information using toKENs) are the standardized frameworks to fight these illegally spoofed calls. Read more →

Traffic Generation Agents in your own local environment

The vast majority of Telco Systems under Test (SuT) are located in private networks or behind firewalls. The reason for that is that a big part of testing takes place in development environments (which often reside directly on developers’ computers), in confined lab environments, or within Continuous Integration workflows. Production systems on the other hand are usually protected by firewalls and ACLs and only allow traffic from and to certain IP address ranges. Read more →

Remote-Controlling sipp

A lot of engineers working in the Telco industry, and particularly those with an affinity towards open source, know about sipp, the performance testing tool for the SIP protocol. Many of those engineers know the default key mappings of the console based interface by heart. Increase the call rate by one with + or by ten with *, quit with q etc. Read more →

Client-side Kamailio

At Sipfront, we implement a product to provide SIP performance testing as a service. The core element of every performance benchmarking is an agent on the client side generating the traffic, which in our case is sipp, while at the same time, Kamailio is a well known SIP proxy typically used on the server side. Read more →