Asterisk – IT Blog

Asterisk. Solution “Not accepting call completion offers from call-forward recipient Local”

Once on one Asterisk server I noticed the following error:

Asterisk Call Recording

I will describe an example of setting up recording telephone conversations in Asterisk, first of all, make sure that the necessary modules are loaded.

Configuring TDM410P with Asterisk

In the test, I connected a Chinese TDM410P board with four FXO ports (red) to the PCI slot of the turned off Ubuntu server.
For convenience, immediately switch to the root user:

Configuring FSK in Asterisk to determine phone numbers

To determine the number from analog lines, you need to specify in the context for each Trunk channel Dahdi:

Configuring SIP Trunk in Asterisk from Ukrtelecom

I will give an example of setting up SIP Trunk in Asterisk, that is, Asterisk will be in the role of a SIP client.
From the provider Ukrtelecom received data: number, password and address of the telephony server (sip.ukrtel.net).
SIP number was taken to make multi-channel not an ordinary city number, by forwarding in case of busy lines.
I will configure on a Linux server with a real IP without using NAT, as well as on another with NAT (in the second case, you need to change nat=no to nat=yes and comment out canreinvite).

Installing Asterisk on Ubuntu Server

I will give an example of a quick installation of Asterisk on Ubuntu Server.
I will install it on versions 14.04 LTS and 16.04 LTS.

Configuring GOIP4 with Asterisk

On the test, I set up a Chinese GSM GOIP4 gateway with an Asterisk server as a trunk.

Asterisk commands

I will describe the possible Asterisk commands that can be entered after connecting to the console:

Monitoring Asterisk in Zabbix

We will monitor Asterisk through Zabbix agent, for this we install it on the same machine as Asterisk.

Frequent messages “Remote UNIX connection” in Asterisk

I noticed once in the Asterisk console that the following messages are often displayed:

— Remote UNIX connection
— Remote UNIX connection disconnected
— Remote UNIX connection
— Remote UNIX connection disconnected
— Remote UNIX connection
— Remote UNIX connection disconnected
…