SIP Retransmissions

What is the problem with SIP retransmits?

Sometimes you get messages in the console like these:

retrans_pkt: Hanging up call XX77yy  - no reply to our critical packet. retrans_pkt: Cancelling retransmit of OPTIONs

The SIP protocol is based on requests and replies. Both sides send requests and wait for replies. Some of these requests are important. In a TCP/IP network many things can happen with IP packets. Firewalls, NAT devices, Session Border Controllers and SIP Proxys are in the signalling path and they will affect the call.

Instalando Asterisk en Raspberry Pi

Asterisk for Raspberry Pi Image

I have installed vanilla Asterisk onto a Raspberry Pi and have created an image for all to use. The Asterisk install is not a bundalled install like raspbx which uses FreePBX. Asterisk is configured with all deafults straight from a new build/compile.

Driver should be 'wctdm' but is actually 'netjet'

Blacklist the evil netjet driver.

 doing something like

echo "blacklist netjet" >> /etc/modprobe.d/dahdi.blacklist.conf
reboot

Guardando la informacion queue_log a MYSQL

Creamos la  TABLA

USE asterisk;
CREATE TABLE queue_log (
  id int(10) UNSIGNED NOT NULL AUTO_INCREMENT,
  time char(26) default NULL,
  callid varchar(32) NOT NULL default '',
  queuename varchar(32) NOT NULL default '',
  agent varchar(32) NOT NULL default '',
  event varchar(32) NOT NULL default '',
  data1 varchar(100) NOT NULL default '',
  data2 varchar(100) NOT NULL default '',
  data3 varchar(100) NOT NULL default '',
  data4 varchar(100) NOT NULL default '',
  data5 varchar(100) NOT NULL default '',
  PRIMARY KEY (`id`)
);

Configuracion del SIP TRUNK de TRICOM

[tricom]
username=ambiorixg12
secret=1Erdo61
remotesecret=1Erdo61
fromuser=8097143489 ; aquí debemos colocar el numero con el cual tricom validara nuestras llamadas.
type=friend
insecure=port,invite
disallow=all
allow=ulaw
dtmfmode=rfc2833
qualify=yes
host=190.6.132.37
directmedia=no

Como poner una emisora de radio como musica en espera en tu Central Asterisk .

Si deseas poner una emisora como música en espera. o simplemente transmitir una emisora de radio desde tu tu central Asterisk.  Aqui les dejo la configuracion que  uso en mi central telefónica. pueden probar cualquiera de las 2 emisoras o cambiar el link pero deben asegurarse que el link este en un formato que  mpg123 pueda reconocer y reproducir. Un punto imporante debemos tener instalado el mpg123.
 apt-get install mpg123

[default]

mode=custom

application=/usr/bin/mpg123 -q -r 8000 -f 8192 -s --mono http://radio2.domint.net:8022

;application=/usr/bin/mpg123 -q -r 8000 -f 8192 -s --mono http://radio3.domint.net:8062

Codec G722 HD Audio

G.722 HD Audio. What’s the big deal?

G.722, HD Voice and HD Audio have become the latest buzzwords in the VoIP (Voice Over Internet Protocol) market in the last year. They are all words to describe the same thing - wideband audio that delivers voice calls using VoIP with audio quality that is greatly superior that of a regular landline or mobile phone call.