Build and Install Dahdi Framework on Switchvox (CentOS 5)

This post is a follow up for creating Switchvox (CentOS 5) EC2 EBS AMI with root partition on LVM

The Problem

Dahdi module needs to be recompiled for a Xen kernel when running Switchvox on Amazon EC2. The kernel version we’re using:

# uname -rvm
2.6.18-371.9.1.el5xen #1 SMP Tue Jun 10 20:24:13 EDT 2014 i686

The Switchvox version:

# cat /etc/redhat-release
PBX build 64078

The error message:

Removing dahdi module: ERROR: Module dahdi does not exist in /proc/modules [FAILED]
Loading dahdi framework: FATAL: Module dahdi not found. [FAILED]
Waiting for zap to come online...Error: missing /dev/dahdi!

Install Dahdi Framework

Install GNU C compiler:

# yum install gcc

Download and unpack dadhi source files:

# wget http://downloads.asterisk.org/pub/telephony/dahdi-linux-complete/dahdi-linux-complete-current.tar.gz
# tar xvfz dahdi-linux-complete-current.tar.gz
# cd dahdi-linux-complete-*

Build the source and install:

# make all && make install
###################################################
###
### DAHDI tools installed successfully.
### If you have not done so before, install init scripts with:
###
###   make config
###
###################################################
make[1]: Leaving directory `/root/dahdi-linux-complete-2.9.1.1+2.9.1/tools'

Start dadhi service:

# /etc/init.d/dahdi start
Loading dahdi framework:                                   [  OK  ]
Waiting for zap to come online...OK
Loading dahdi hardware modules: dahdi_transcode wct4xxp wcte43x wct1xxp wcte11xp wcte12xp wcte13xp wcfxo wctdm wctdm24xxp wcaxx wcb4xxp wctc4xxp
No functioning zap hardware found in /proc/dahdi, loading dahdi_dummy
Running dahdi_cfg:                                         [  OK  ]

Check for kernel modules to be loaded:

# lsmod | grep dahdi
dahdi_voicebus         53920  2 wctdm24xxp,wcte12xp
dahdi_transcode        12036  1 wctc4xxp
dahdi                 214716  14 wcb4xxp,wcaxx,wctdm24xxp,wctdm,wcfxo,wcte13xp,wcte12xp,dahdi_voicebus,wcte11xp,wct1xxp,wcte43x,wct4xxp,oct612x,dahdi_transcode
crc_ccitt               6337  2 wctdm24xxp,dahdi

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