Thursday, June 5, 2025

Granulating hangup causes on Asterisk with Kamailio. Or getting one.

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 I'm not touching Asterisk SIP-related things a lot, but when I do, it can be frustrating from time to time. Or maybe I don't know t...
Friday, May 16, 2025

Kamailio TLS connection lifetime

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 TL;DR; Pay attention to  modparam("tls", "connection_timeout", 600) # Default  A bit longer. Usually, you don't nee...
Wednesday, March 5, 2025

Kamailio - change script behavoir at a realtime

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For the moment, it's impossible to apply changes to Kamailio config file (not using KEMI, for sure) without restarting Kamailio. Here is...
Tuesday, January 7, 2025

Asterisk PJSIP endpoint identification by To number

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Recently got an interesting task. For calls, that are made to a specific number, apply DTMF transcoding towards caller side. Means when some...
Thursday, October 10, 2024

Collecting MOS stats from rtpengine with Kamailio

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 Not a secret, that rtpengine can collect MOS stats during a call. So, this small note is just filling some gaps in an official documentati...
Monday, July 29, 2024

Sipsak → sipexer for small SIP tests

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I think a lot of peoples who are working with SIP knows and use sipsak . It's a Swiss-army knife for SIP, as it states. But not any...
Thursday, June 27, 2024

No or distorted sound using SRTP and rtpengine

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  TL;DR; SDES-pad  Long version: Recently had a chance of upgrading rtpengine from version 8 to version 12.  For those, who don't know ...