Back to Blog
Tech

SIP Messages of the Call

Published on:

May 22, 2013

SIP's human-readable format, unlike H.323, allows easier understanding of the communication between clients and servers, though not everyone can interpret the details without understanding the specific RFCs. This clarity helps when troubleshooting issues, especially when reviewing SIP logs. In multi-domain environments, however, finding relevant messages can be challenging, especially when filtering by IP only works at the system level. The upcoming version 5.0.11 will address this by allowing domain administrators to access SIP logs, making it easier to diagnose issues in isolated environments independent of other system traffic. This update promises significant improvements.

Christian Stredicke

In contrast to other protocols like H.323, SIP is a "human readable" format just like HTTP or SMTP. Some people say this was the reason why SIP was more successful than H.323.

But human readable doesn't mean it can be read by all humans, especially those who didn't have the time to flip through the pages of RFC3261, RFC3262, RFC3263 and so on - and they would have had a hard time to understand what exactly is going on between the client and the server. On a side note, http://rfc3261.net is still one of the "favorite" web pages when it comes to understanding SIP.

Reading the SIP messages helps a lot to troubleshoot the problems with the many SIP service providers out there. Even if the reader understands only a fraction of the content, it's already helping. Not to mention that the people supporting snom ONE get access to traces that tell a lot about potential problems.

In the multi-domain environment, SIP logs are even more difficult to read. Especially on busy systems, finding the right messages is like searching for a needle in a hay stack. Filtering by IP address was a workaround, but it only works only at system level, which leaves the domain administrators without a workable solution.

We already collected the call-related SIP packages in the call. For example, when the PBX detected one-way audio, it would append the messages in the email that reports this event.

In the next version we will also include messages on the domain level. This will make it possible that domain administrators can look at the SIP packets. And it will make it easier to look at problems in the isolated environments independently from other traffic on the PBX.

5.0.11 will be the best we ever had.

Latest Articles

View All
Announcement

The World of Vodia: One Extension, Every Way You Work

Your Vodia extension is no longer tied to a single device or location. Native iOS and Android apps, the browser-based User Portal, PWA support, Vodia Hub and click-to-dial extensions provide different ways to connect with the same Vodia PBX. Make and receive business calls from your smartphone, manage communication from your browser, control calls from the Windows desktop or dial numbers directly from the applications and webpages you already use. Wherever work takes place, Vodia provides an experience designed for the device and workflow at hand.

August 20, 2026
Announcement

From Check-In to Check-Out: Two Years of the Vodia-Cloudbeds Integration

The Vodia-Cloudbeds integration connects hotel communications with essential property-management workflows. From check-in to check-out, it automatically enables and personalizes room extensions, applies guest calling permissions, posts eligible call charges to Cloudbeds and resets extension data after each stay. Two years on, the integration continues Vodia’s long-standing work in hospitality, helping hotel teams reduce manual administration, protect guest information and keep telephone services synchronized with their daily operations.

August 18, 2026
Announcement

The Vodia-Jitsi Meet Integration: Some Thoughts on Content Privacy

The Vodia integration with Jitsi Meet brings secure, self-hosted video conferencing directly into the Vodia PBX web portal. Users can launch meetings with a single click, while organizations maintain control over their infrastructure, meeting content and access. With JWT-based authentication, automatic room creation tied to extensions and controlled guest access, the integration offers a private, scalable alternative to conventional hosted video conferencing platforms while bringing voice and video together in one communications environment.

August 13, 2026