Posts in category voiptoolbox

11 Sep 2026

Sending Calls to Voice Apps in an E5 Sandbox

Dev SysAdmin SIP Teams Voiptoolbox

For those developing integrations with Microsoft O365 you'll probably have come across the E5 Sandbox tenants. These are temporary tenants provided by Microsoft, full of plausible but fake users and data, specifically targeted at Developers. What if you want to send test calls into your voice app or auto attendant/call queue in an E5 Sandbox? It can be done!

02 May 2026

VoIP Toolbox: Is the SIP in this PCAP OK?

SIP Dev Voiptoolbox SysAdmin

VoIP Toolbox can already pull SIP call flows out of a PCAP, directly in the browser. The latest update runs sipright over every SIP message. This gives a high level good/warning/bad call indicator, aiming to make problematic parts of a capture stand out at a quick glance.

05 Dec 2025

VoIP Toolbox - Monitoring SIP Endpoints

SIP Dev SysAdmin Voiptoolbox

VoIP Toolbox now offers SIP monitoring, from basic SIP OPTIONS health checks to more advanced scenarios like registration or calling.

25 Aug 2025

voiptoolbox.net SIP PCAP Viewer

SIP Dev SysAdmin Voiptoolbox

VoIP Toolbox now supports viewing SIP calls from a PCAP file direct in the browser.

14 Jul 2023

Building voiptoolbox.net Chapter 3 - SIP Auth Headers

SIP Dev SysAdmin Voiptoolbox

How can you tell if an Authorization header in a SIP request is correct? VoIP Toolbox can now help you replicate the auth calculations to confirm things are working as expected.

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