Contar y Limitar la cantidad de llamadas en Asterisk

Supongamos que tenemos una T1 o Troncal SIP con una cantidad de  24 canales y a l vez tenemos 6 DID. Podemos  asignar  4 canales a cada DID  para así evitar que un solo  DID consuma todos nuestros canales  y exista un balanceo.

Restringir las llamadas basada en pines de seguridad

 [mycontext]
;disa
exten=>*4,1,Authenticate(/etc/asterisk/premiun_pass.conf,a)
same=n,Disa(no-password,mobile)

exten=>*5,1,Authenticate(/etc/asterisk/local_pass.conf,a)
same=n,Disa(no-password,localphone)

Asterisk stops responding to SIP devices if it loses Internet Access (DNS)

If Asterisk loses internet connectivity or DNS, it stops responding to all SIP devices and trunks, and all extensions lose connectivity. This bug has apparently been around since Asterisk 1.4, persisted through 1.6, and remains in 1.8

Que informacion necesito de mi provedor telefonico para configurar mi T1.

you'll want to know the framing and the coding.?

<framing>

The framing is one of "d4" or "esf" for T1 or "cas" or "ccs" for E1

Note: "d4" could be referred to as "sf" or "superframe"

<coding>

The coding is one of "ami" or "b8zs" for T1 or "ami" or "hdb3" for E1

E1's may have the additional keyword "crc4" to enable CRC4 checking

You'll want to know the signaling type - is it a PRI, is it E&M?

You'll want to know how many voice channels you've got. If it's PRI where your d-channel is.

If it's PRI, what type of PRI signaling is it.

If it's E&M, you'll want to know whether it's immediate, wink, or Feature Group D.

You'll want to know how many digits you get on dialed numbers.

Ejemplos de los archivos de configuracion de Asterisk.

El siguiente link tiene la configuracion de ejemplo de cada archivo relacionado con la configuracion de Asterisk.

http://svn.digium.com/svn/asterisk/trunk/configs/

Asterisk Channels Live

Esta aplicacion hecha para Windows, te permite monitorear el estatus de tus agentes y telefonos  en tu central Asterisk. EL projecto tiene dos sitios webs ademas  es muy facil de configurar en plataformas como Elastix y  Freepbx Distro.

http://www.astchannelslive.com/index.html

http://sourceforge.net/projects/astchannelslive/

Asterisk Local Channels

In Asterisk, Local channels are a method used to treat an extension in the dialplan as if it were an external device. In essense, Asterisk will send the call back into the dialplan as the destination of the call, versus sending the call to a device.
Two of the most common areas where Local channels are used include members configured for queues, and in use with callfiles. There are also other uses where you want to ring two destinations, but with different information, such as different callerID for each outgoing request.