FreePBX/mISDN

Maintainer

Daniel B.
Firewall Services
mailto:daniel@firewall-services.com

Description

The goal of this how-to is to explain how to configure an hardware card supported by the mISDN driver, in order to use it with FreePBX

Installation

	Note:
	This has only be tested with a b410P card from Digium. It should be the same for other compatible hardware

Plug your card

Of course, the first step here is to plug your card in a free PCI slot

Install mISDN driver

Now you need to install the mISDN driver. You can use the following command:

yum --enablerepo=smecontribs install misdn misdnuser misdn-kmdl-$(uname -r)

For this to work you may need to update your server (at least, you should have the latest kernel available)

Configure the driver

You can check the card is recognized and supported with this command:

/etc/init.d/mISDN scan

Now, you can generate a basic configuration with:

/etc/init.d/mISDN config

The generated config file is /etc/mISDN.conf The default will configure all available ports in te mode. This is ok if you only want to use the ports as trunks. If you want to connect an ISDN phone, you'll have to change the corresponding port to nt mode.

Now, you need to configure this driver to be loaded automatically at system boot:

db configuration set mISDN service status enabed
ln -s /etc/rc.d/init.d/e-smith-service /etc/rc7.d/S09mISDN
ln -s /etc/rc.d/init.d/e-smith-service /etc/rc6.d/K16mISDN

Install the channel for asterisk

For asterisk to work with mISDN, it needs a channel (chan_misdn). For now, you need to take this package from ATrpms repository (in the future, this package should be imported in smecontribs)

yum --enablerepo=atrpms install asterisk-misdn

This may also update asterisk, it shouldn't be a problem.

Configure the channel

Now, you can configure the channel. The config file is /etc/asterisk/misdn.conf Most of the config should be OK (at least, it was for me, in France). You just need to change the mISDN config file:

sed -i -e "s/\/etc\/misdn-init.conf/\/etc\/mISDN.conf/g"

You may alos want to enable echo cancellation (default is disabled). Thee configuration file is well commented.

The most important part is to configure group of ports, for example:

[trunks]
ports=1,2,3,4
context=from-trunk
msns=*

This will configure a group of ports (from 1 to 4). The name of this group is "trunks". Any calls comming from one of these ports will be processed from the from-trunk context (the default context for trunks in FreePBX

Create a trunk in FreePBX

	Incomplete:
	This article or section needs to be expanded. Please help to fill the gaps or discuss the issue on the talk page