Sometimes there is a need for simple and quick analysis or the troubleshooting of a SIP server and its call functions. Of course, we should use the well-known tcpdump, mentioned in the article Using tcpdump for SIP diagnostics. However, for…

This post is relevant to all Cicso SPA phones, which have „G“ letter in their names. „G“ means global (that you can put there languages), not gigabit ethernet (all phones have 100 Mbps interfaces). First of all, you need to…

When setting timezone, you can set interval of daylight saving time rule. In Slovakia, it is from last sunday of march up to last sunday of october, and change is being made at 2:00. Configuration is made under regional tab…

In many setups Kamailio is used as a PROXY server that takes care of routing calls to servers providing voice services, e.g. voicemail, IVR or conference calls. There are a few things an administrator must keep in mind.

This article talks about deploying permission control mechanism for call establishment in Kamailio SIP Proxy. In many VoIP solutions, it is crutial to deploy numbering scheme and write down rules where users are/aren't allowed to call. On top of that,…

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