Asterisk – IT Blog

Solution Unable to retrieve PJSIP transport in Asterisk

The error “Unable to retrieve PJSIP transport …” occurs when TRANSPORT does not exist or is specified incorrectly.

Installing Asterisk from source

In this article, I will give an example of installing Asterisk from source code, for example, I needed it to install a new version of Asterisk on Ubuntu Server 22.04, since Asterisk 18 was installed from the default repository, and there were no modules I needed by default, such as Voicemail.

Asterisk Administrator Guide (pdf)

Download Asterisk Administrator Guide
File Format: PDF
Pages: 679
Language: English
File size: 4.42 MB

Blacklisting in Asterisk

I will give an example of blocking incoming calls by phone number, or you can perform other actions for the phone numbers specified in the list.

Zabbix trigger during business hours

In this article, I will give an example of creating triggers in Zabbix that can only fire at certain times, and not always.

Solution Registration failed due to STUN server (DNS resolving or connection) error (59) Zoiper

Once I installed the Zoiper application on the iPhone to connect to the telephony server and found an error:

Setting up SIP Trunk in Asterisk from Kyivstar

I will give an example of setting up a SIP Trunk in Asterisk from Kyivstar. Once it was necessary to increase the number of incoming lines, at first I used Goip4 gateways and 6 Kyivstar SIM cards, but when all the lines were busy, the clients could not get through, even hear the answering machine / voice menu, so I signed a contract for SIP Trunk with the Kyivstar manager.

Solution for warning Asked to transmit frame type ulaw, while native formats is (g729) read/write = ulaw/ulaw

Once a user made a call and Asterisk began to display a lot of warnings, and there was also no sound:

Asterisk. MP3 for Music on hold (moh)

In this article, I will provide an example of setting up MP3 for Music on hold (moh) in Asterisk.

ABillS. Installing and configuring Callcenter

Once in one company, in order to simplify the search for callers in ABillS, it was necessary to install the Callcenter module, which has different capabilities, but what we needed was pop-up notifications in the browser with a link to the caller’s page.