Difference between revisions of "Asterisk - the open source soft PBX (PPC)"

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<font color="RED">THIS ARTICLE IS STILL UNDER CONSTRUCTION</font>
+
{{Underconstruction|Asterisk - the open source soft PBX (PPC)}}
{{Warning|THIS ARTICLE IS STILL UNDER CONSTRUCTION}}
+
{{Warning| Your results may vary if you try to implement what you see here, specifically I'm not sure about all of the packages needed to get Asterisk to compile properly.  And I have had some significant problems in getting bluetooth audio (SCO) to work properly to channel the calls from the cellphone to asterisk}}
  
 
{{Template:Articles|LS1 | HG }}
 
{{Template:Articles|LS1 | HG }}
 
[[Image:Asterisk.png|right]]
 
[[Image:Asterisk.png|right]]
 
==Abstract ==
 
==Abstract ==
The idea for this concept came from a bluetooth cordless cellphone extender that I saw at someone's house like this one: [http://www.panasonic.com/consumer_electronics/telephones_central/link-to-cell/link-to-cell.asp Bluetooth to Cordless Phone ].  Sometime later, I read that Asterisk has a module called chan_mobile which lets you use a cellphone as if it was a trunk over a SIP phone.  So if you had a service such as [[w:Vonage|Vonage]] and an [[w:Analog telephony adapter|ATA]] that you could "open" you could get started.  Well that was enough to get me started, so I implemented this solution first on an [[w:Ubuntu|Ubuntu]] boxI'm still working on getting it fully implemented on a PPC linkstation.  Bluetooth audio has been the sticking point, but I'm confident that kernel 2.6.29+ will be the answer.   
+
The idea for this concept came from a [[w:Bluetooth|bluetooth]] cordless cellphone extender that I saw at someone's house like this one: [http://www.panasonic.com/consumer_electronics/telephones_central/link-to-cell/link-to-cell.asp Bluetooth to Cordless Phone].  Sometime later, I read about ''chan_mobile'' which is an Asterisk channel driver that allows you to use a bluetooth capable cell phone as an [[w:Foreign exchange station|FXS]] channel.  Asterisk will accept a [[w:Analog telephony adapter|ATA]] that you could "open" from [[w:VOIP|VOIP]] phone service such as [[w:Vonage|Vonage]] as an [[w:FxO|FXO]] channel.   
  
What this would do is allow you to use a Linkstation running [[w:Asterisk (PBX)|Asterisk]] to turn a cellphone into a trunk for 1 or more [[w:IP Phone|SIP Phone]]s or [[w:Analog telephony adapter|ATA]]s.  Asterisk is pretty powerful and would allow you to integrate [[w:POTS|POTS/PSTN]] lines (with a [[w:FXO|FXO]]/[[w:FXS|FXS]] adapter like the [http://www.cisco.com/en/US/products/ps10027/index.htm SPA3102]), a VOIP service (such as Vonage), and now a Cell Phone too!
+
Well that was enough to get me started, so I implemented this solution first on an [[w:Ubuntu|Ubuntu]] box.  I'm still working on getting it fully implemented on a PPC linkstation.  Bluetooth audio (SCO) has been the sticking point, but I'm confident that kernel 2.6.28+ will be the answer.   
 +
 
 +
This would allow you to use a Linkstation running [[w:Asterisk (PBX)|Asterisk]] in order to turn a cellphone into a trunk for 1 or more [[w:IP Phone|SIP Phone]]s or [[w:Analog telephony adapter|ATA]]s.  Asterisk is pretty powerful and would allow you to integrate [[w:POTS|POTS/PSTN]] lines (with a [[w:FXO|FXO]]/[[w:FXS|FXS]] adapter like the [http://www.cisco.com/en/US/products/ps10027/index.htm SPA3102]), a VOIP service (such as Vonage), and now a Cell Phone too!
  
  
 
=== Prerequisites ===
 
=== Prerequisites ===
This article assumes that you have installed [[FreeLink]] on PPC Box that has been [[U-boot bootloader|U-booted]].  You also will need to upgrade to a 2.6.28+ Kernel, (the bluetooth SCO audio driver doesn't seem to work right otherwise.
+
This article assumes that you have installed [[FreeLink]] on PPC Box that has been [[U-boot bootloader|U-booted]].  You also will need to upgrade to a 2.6.28+ Kernel, (the bluetooth SCO audio driver doesn't seem to work right otherwise).
  
In order to implement this on a ARM or MIPSel box you would need to cross compile asterisk, as it will not natively compile on either of those two architectures.  
+
In order to implement this on a ARM box you would need to cross compile asterisk, as it will not natively compile on this architecture. Your results may vary with MIPSel, but this article might be a good starting point: [[Asterisk - the open source soft PBX (MIPSel)]]
  
 
===What you'll need===
 
===What you'll need===
 
+
{|
* [[Image:Kuro-box.jpg|25px]]: A [[FreeLink]]ed PowerPC Linkstation like a [[LS1]], [[HG]], or [[Kurobox]]
+
|-
** It needs to have the [[U-boot bootloader]] to load a 2.6.28+ Kernel with modules  
+
|| [[Image:Kuro-box.jpg|25px]] || or || [[Image:HD-H(G).jpg|25px]] || A [[FreeLink]]ed PowerPC Linkstation like a [[LS1]], [[HG]], or [[Kurobox]]. You will need to have the [[U-boot bootloader]] installed to load a 2.6.28+ Kernel with modules (which you'll have to make too). 
* [[Image:linksys_pap2_01.jpg|25px]]: One or more Unlocked [[w:Analog telephony adapter|Analog telephony adapter]]s or [[w:IP Phone|IP Phone]]s. Such as the [[w:Linksys PAP2|Linksys PAP2]]  
+
|-
* [[Image:DBT-120.jpg|25px]]: A [[w:Bluetooth|Bluetooth]] [[w:USB|USB]] Dongle, preferably one with a [[w:Cambridge Silicon Radio|Cambridge Silicon Radio]] Chipset (it works better with chan_mobile) The Dlink DBT-120 is mentioned most often
+
||  || [[Image:linksys_pap2_01.jpg|25px]] || || One or more Unlocked [[w:Analog telephony adapter|Analog telephony adapter]]s or [[w:IP Phone|IP Phone]]s. Something like the [[w:Linksys PAP2|Linksys PAP2]] is common.  A softphone such as [http://www.zoiper.com/ Zoiper!] can be used as a test bed if you don't have a IP Phone/ATA lying around.
 +
|-
 +
|| || [[Image:DBT-120.jpg|25px]] || || A [[w:Bluetooth|Bluetooth]] [[w:USB|USB]] Dongle, preferably one with a [[w:Cambridge Silicon Radio|Cambridge Silicon Radio]] Chipset (it works better with chan_mobile) The [[w:Dlink|Dlink]] [http://www.dlink.com/search/?qry=dbt120 DBT-120] is listed by default in the ''chan_mobile'' configuration file.
 +
|-
 +
|| || [[Image:Iphone.jpg|25px]] || || A [[w:Bluetooth|Bluetooth]] capable [[w:Mobile Phone|Cell Phone]] of course!  Review the [http://www.voip-info.org/wiki/view/chan_mobile chan_mobile - Voip-info.org] page to see if your bluetooth dongle and bluetooth cellphone will work properly.
 +
|}
  
 
==Install Asterisk==
 
==Install Asterisk==
Line 38: Line 45:
 
   apt-get install procps
 
   apt-get install procps
 
   apt-get install doxygen
 
   apt-get install doxygen
 
+
  apt-get install adduser 
 +
  apt-get install libasound2
 +
  apt-get install libc-client2007b 
 +
  apt-get install libc6
 +
  apt-get install libcap2
 +
  apt-get install libcurl3
 +
  apt-get install libgcc1
 +
  apt-get install libgsm1
 +
  apt-get install libncurses5
 +
  apt-get install libnewt0.52
 +
  apt-get install libogg0 
 +
  apt-get install libpopt0
 +
  apt-get install libpri1.0 
 +
  apt-get install libradiusclient-ng2
 +
  apt-get install libsnmp15
 +
  apt-get install libspeex1
 +
  apt-get install libspeexdsp1 
 +
  apt-get install libsqlite0
 +
  apt-get install libssl0.9.8
 +
  apt-get install libstdc++6
 +
  apt-get install libtonezone1 
 +
  apt-get install libunwind7
 +
  apt-get install libvorbis0a 
 +
  apt-get install libvorbisenc2
 +
  apt-get install libvpb0
 +
  apt-get install unixodbc 
 +
  apt-get install zlib1g
 +
  apt-get install bluetooth bluez-utils libbluetooth2 libbluetooth2-dev
  
 
===Get Asterisk package===
 
===Get Asterisk package===
Line 106: Line 140:
  
 
Copy the hardware address from the output of the following command for the next step.
 
Copy the hardware address from the output of the following command for the next step.
(eg. xx:xx:xx:xx:xx:xx). Now edit <tt>/etc/asterisk/mobile.conf</tt>
+
(eg. xx:xx:xx:xx:xx:xx). Use this address for <tt>/etc/asterisk/mobile.conf</tt>  
  
In the first [adapter] stanza where “id=blue” replace the mac address with the one you copied down.
 
  
====Pair your phone with your "asterisk box"====
+
====Pair your cellphone with your "asterisk box"====
  
dbus-send --system --type=method_call --print-reply --dest=org.bluez /org/bluez/hci0 org.bluez.Adapter.SetMode string:discoverable
+
dbus-send --system --type=method_call --print-reply --dest=org.bluez /org/bluez/hci0 org.bluez.Adapter.SetMode string:discoverable
  
Grab your cell phone, turn Bluetooth on and search for devices. You should find your PBX as
+
# Grab your cell phone, turn Bluetooth on and search for devices.  
Asterisk PBX. Pair with a pin of 1234.
+
# You should find your PBX as '''Asterisk PBX'''.  
 
+
# Pair with a pin of '''1234'''.
Make your phone discoverable via Bluetooth.
+
# Make your phone discoverable via Bluetooth.
 
+
 
+
Let’s make sure we can see your phone or headset. Use the command:
+
  
 +
+
 
  hcitool scan  
 
  hcitool scan  
  
Line 146: Line 177:
 
  00:1B:XX:XX:XX:XX Someones iPhone Yes Phone 8
 
  00:1B:XX:XX:XX:XX Someones iPhone Yes Phone 8
  
 +
{|  class="wikitable" cellpadding="0" cellspacing="0" 
 +
|-
 +
!| 1 !! 2 !! 3 !! 4 !! 5
 +
|-
 +
!| Address !! Name !! Usable !! Type !! Port
 +
|-
 +
|| 00:1B:XX:XX:XX:XX ||Someones iPhone || Yes || Phone || 8
 +
|}
 
This is a list of all bluetooth devices seen and whether or not they are usable with chan_mobile.
 
This is a list of all bluetooth devices seen and whether or not they are usable with chan_mobile.
  
a. The Address field contains the 'bd address' of the device. This is like an ethernet mac address.
+
# The Address field contains the 'bd address' of the device. This is like an ethernet mac address.
 
+
# The Name field is whatever is configured into the device as its name.
b. The Name field is whatever is configured into the device as its name.
+
# The Usable field tells you whether or not the device supports the Bluetooth Handsfree Profile or Headset profile.
 
+
# The Type field tells you whether the device is usable as a Phone line (FXO) or a headset (FXS).
c. The Usable field tells you whether or not the device supports the Bluetooth Handsfree Profile or Headset profile.
+
# The Port field is the number to put in the configuration file: <tt>/etc/asterisk/mobile.conf</tt>.
 
+
d. The Type field tells you whether the device is usable as a Phone line (FXO) or a headset (FXS).
+
 
+
e. The Port field is the number to put in the configuration file.
+
 
+
 
+
Choose which device(s) you want to use and edit /etc/asterisk/mobile.conf
+
 
+
 
+
For a phone create a stanza like the one below and paste in the MAC address on
+
the address line and also make sure you use the port that was displayed during
+
the mobile search. The 'id' of the device [bitinbrackets] can be anything you
+
like, just make the unique.
+
 
+
<pre>
+
[my_phone]
+
address=xx:xx:xx:xx:xx:xx ; the address of the phone
+
port=x ; the port number (from mobile search)
+
context=from-mobile ; dialplan context for incoming calls
+
adapter=blue ; adapter to use
+
</pre>
+
 
+
 
+
  
 
==Configuration Files==
 
==Configuration Files==
Line 183: Line 199:
 
===modules.conf===
 
===modules.conf===
 
===mobile.conf===
 
===mobile.conf===
 +
 +
Choose which device(s) you want to use and edit <tt>/etc/asterisk/mobile.conf</tt>,  For a phone create a stanza like the one below and paste:
 +
 +
# The MAC address on the address line
 +
# The port that was displayed during the mobile search.
 +
# The 'id' of the device [bitinbrackets] can be anything you like, just make the unique.
 +
 +
<pre>
 +
[general]
 +
 +
interval=30 ; Number of seconds between trying to connect to devices.
 +
 
 +
; The following is a list of adapters we use.
 +
; id must be unique and address is the bdaddr of the adapter from hciconfig.
 +
; Each adapter may only have one device (headset or phone) connected at a time.
 +
; Add an [adapter] entry for each adapter you have.
 +
 +
[adapter]
 +
id=blue
 +
address=XX:XX:XX:XX:XX:XX
 +
;forcemaster=yes ; attempt to force adapter into master mode. default is no.
 +
;alignmentdetection=yes ; enable this if you sometimes get 'white noise' on asterisk side of the call
 +
; its a bug in the bluetooth adapter firmware, enabling this will compensate for it.
 +
; default is no.
 +
 +
; The following is a list of the devices we deal with.
 +
; Every device listed below will be available for calls in and out of Asterisk.
 +
; Each device needs an adapter=xxxx entry which determines which bluetooth adapter is used.
 +
; Use the CLI command 'mobile search' to discover devices.
 +
; Use the CLI command 'mobile show devices' to see device status.
 +
;
 +
 +
; To place a call out through a mobile phone use Dial(Mobile/[device]/NNN.....) or Dial(Mobile/gn/NNN......) in your dialplan.
 +
 +
; To call a headset use Dial(Mobile/[device]).
 +
 +
[iphone]
 +
 +
address=00:1B:XX:XX:XX:XX ; the address of the phone
 +
port=8 ; the rfcomm port number (from mobile search)
 +
context=from-mobile ; dialplan context for incoming calls
 +
adapter=blue ; adapter to use
 +
group=1 ; this phone is in channel group 1
 +
;nocallsetup=yes ; set this only if your phone reports that it supports call progress notification, but does not do it. Motorola L6 for example.
 +
 +
</pre>
  
  
  
  
==References==
 
  
 +
==References==
 +
This article was HEAVILY plagarized from the references below, but I figured I'd try to gather the information in one place. Unfortunately ''chan_mobile'' does not have great documentation, the best documentation for it seems to be at Voip-info.org.
 
# [http://rutmandal.info/infotalk/2009/03/02/asterisk-1606-on-debian-40/ Asterisk 1.6.0.6 on Debian 4.0]
 
# [http://rutmandal.info/infotalk/2009/03/02/asterisk-1606-on-debian-40/ Asterisk 1.6.0.6 on Debian 4.0]
 
# [http://www.debian-resources.org/node/129 Setup Asterisk 1.6 with DAHDI on Debian Etch]
 
# [http://www.debian-resources.org/node/129 Setup Asterisk 1.6 with DAHDI on Debian Etch]

Latest revision as of 16:58, 5 March 2009

Crystal package settings.png
This page is a user's work in progress page, not an article, and may be incomplete and/or unreliable. The current/final version of this article is, or will be, located at Asterisk - the open source soft PBX (PPC).
Nuvola apps important.png 
WARNING!

Your results may vary if you try to implement what you see here, specifically I'm not sure about all of the packages needed to get Asterisk to compile properly. And I have had some significant problems in getting bluetooth audio (SCO) to work properly to channel the calls from the cellphone to asterisk

Asterisk.png

Contents

Abstract

The idea for this concept came from a bluetooth cordless cellphone extender that I saw at someone's house like this one: Bluetooth to Cordless Phone. Sometime later, I read about chan_mobile which is an Asterisk channel driver that allows you to use a bluetooth capable cell phone as an FXS channel. Asterisk will accept a ATA that you could "open" from VOIP phone service such as Vonage as an FXO channel.

Well that was enough to get me started, so I implemented this solution first on an Ubuntu box. I'm still working on getting it fully implemented on a PPC linkstation. Bluetooth audio (SCO) has been the sticking point, but I'm confident that kernel 2.6.28+ will be the answer.

This would allow you to use a Linkstation running Asterisk in order to turn a cellphone into a trunk for 1 or more SIP Phones or ATAs. Asterisk is pretty powerful and would allow you to integrate POTS/PSTN lines (with a FXO/FXS adapter like the SPA3102), a VOIP service (such as Vonage), and now a Cell Phone too!


Prerequisites

This article assumes that you have installed FreeLink on PPC Box that has been U-booted. You also will need to upgrade to a 2.6.28+ Kernel, (the bluetooth SCO audio driver doesn't seem to work right otherwise).

In order to implement this on a ARM box you would need to cross compile asterisk, as it will not natively compile on this architecture. Your results may vary with MIPSel, but this article might be a good starting point: Asterisk - the open source soft PBX (MIPSel)

What you'll need

Kuro-box.jpg or HD-H(G).jpg A FreeLinked PowerPC Linkstation like a LS1, HG, or Kurobox. You will need to have the U-boot bootloader installed to load a 2.6.28+ Kernel with modules (which you'll have to make too).
Linksys pap2 01.jpg One or more Unlocked Analog telephony adapters or IP Phones. Something like the Linksys PAP2 is common. A softphone such as Zoiper! can be used as a test bed if you don't have a IP Phone/ATA lying around.
DBT-120.jpg A Bluetooth USB Dongle, preferably one with a Cambridge Silicon Radio Chipset (it works better with chan_mobile) The Dlink DBT-120 is listed by default in the chan_mobile configuration file.
Iphone.jpg A Bluetooth capable Cell Phone of course! Review the chan_mobile - Voip-info.org page to see if your bluetooth dongle and bluetooth cellphone will work properly.

Install Asterisk

Install various pre-requisite libraries

 apt-get install make
 apt-get install gcc
 apt-get install g++
 apt-get install libc-dev
 apt-get install bison
 apt-get install ncurses-dev
 apt-get install libssl-dev
 apt-get install libnewt-dev
 apt-get install zlib1g-dev
 apt-get install initrd-tools
 apt-get install cvs
 apt-get install procps
 apt-get install doxygen
 apt-get install adduser  
 apt-get install libasound2
 apt-get install libc-client2007b  
 apt-get install libc6 
 apt-get install libcap2
 apt-get install libcurl3 
 apt-get install libgcc1 
 apt-get install libgsm1 
 apt-get install libncurses5
 apt-get install libnewt0.52 
 apt-get install libogg0  
 apt-get install libpopt0 
 apt-get install libpri1.0  
 apt-get install libradiusclient-ng2 
 apt-get install libsnmp15 
 apt-get install libspeex1 
 apt-get install libspeexdsp1  
 apt-get install libsqlite0 
 apt-get install libssl0.9.8
 apt-get install libstdc++6
 apt-get install libtonezone1  
 apt-get install libunwind7 
 apt-get install libvorbis0a  
 apt-get install libvorbisenc2 
 apt-get install libvpb0 
 apt-get install unixodbc  
 apt-get install zlib1g
 apt-get install bluetooth bluez-utils libbluetooth2 libbluetooth2-dev

Get Asterisk package

 wget http://downloads.digium.com/pub/asterisk/releases/asterisk-1.6.0.6.tar.gz
 tar xvzf asterisk-1.6.0.6.tar.gz
 cd asterisk-1.6.0.6


Complete Asterisk Installation

 ./configure

If you see asterisk symbol in the end, configuration is successful. Else, grep for “no” in config.log and try to install those missing libraries/utilities.

 make
 make install
 make samples 
 make progdocs 

Install Asterisk Addons and chan_mobile

wget http://downloads.digium.com/pub/asterisk/releases/asterisk-addons-1.6.0.tar.gz
tar zxvf asterisk-addons-1.6.0.tar.gz
 cd /usr/src/asterisk/asterisk-addons-1.6.0
./configure 
make menuselect 

Choose chan_mobile press x to exit

make 

As root user

make install


Configure chan_mobile

Bluetooth settings and pairing

edit /etc/bluetooth/hcid.conf and replace the contents with:

options {
autoinit yes;
security auto;
pairing multi;
passkey "1234";
}# Default settings for HCI devices
device {
name "Asterisk PBX";
class 0x000100;
iscan enable; pscan enable;
lm accept;
lp rswitch,hold,sniff,park;
}

Restart bluetooth

/etc/init.d/bluetooth restart

Makre sure bluetooth works and get MAC address for bluetooth adapter

hcitool dev

You should see something like this:

Devices:
hci0 00:16:38:39:44:88

Copy the hardware address from the output of the following command for the next step. (eg. xx:xx:xx:xx:xx:xx). Use this address for /etc/asterisk/mobile.conf


Pair your cellphone with your "asterisk box"

dbus-send --system --type=method_call --print-reply --dest=org.bluez /org/bluez/hci0 org.bluez.Adapter.SetMode string:discoverable
  1. Grab your cell phone, turn Bluetooth on and search for devices.
  2. You should find your PBX as Asterisk PBX.
  3. Pair with a pin of 1234.
  4. Make your phone discoverable via Bluetooth.

+

hcitool scan 

You should see something like this:

hcitool scan
Scanning ...
00:1B:XX:XX:XX:XX Someones iPhone

If you see your phone above all is well and we can now search for your bluetooth devices using the CLI command 'mobile search'. Be patient with this command as it will take 8 - 10 seconds to do the discovery.

First start the asterisk console

asterisk –r

In the console type in the command mobile search

asterisk*CLI> mobile search 

This will return something like the following:

Address Name Usable Type Port
00:1B:XX:XX:XX:XX Someones iPhone Yes Phone 8
1 2 3 4 5
Address Name Usable Type Port
00:1B:XX:XX:XX:XX Someones iPhone Yes Phone 8

This is a list of all bluetooth devices seen and whether or not they are usable with chan_mobile.

  1. The Address field contains the 'bd address' of the device. This is like an ethernet mac address.
  2. The Name field is whatever is configured into the device as its name.
  3. The Usable field tells you whether or not the device supports the Bluetooth Handsfree Profile or Headset profile.
  4. The Type field tells you whether the device is usable as a Phone line (FXO) or a headset (FXS).
  5. The Port field is the number to put in the configuration file: /etc/asterisk/mobile.conf.

Configuration Files

To be done

sip.conf

extensions.conf

modules.conf

mobile.conf

Choose which device(s) you want to use and edit /etc/asterisk/mobile.conf, For a phone create a stanza like the one below and paste:

  1. The MAC address on the address line
  2. The port that was displayed during the mobile search.
  3. The 'id' of the device [bitinbrackets] can be anything you like, just make the unique.
[general]
 
interval=30		; Number of seconds between trying to connect to devices. 
  
; The following is a list of adapters we use.
; id must be unique and address is the bdaddr of the adapter from hciconfig.
; Each adapter may only have one device (headset or phone) connected at a time.
; Add an [adapter] entry for each adapter you have.
 
[adapter]
id=blue
address=XX:XX:XX:XX:XX:XX
;forcemaster=yes	; attempt to force adapter into master mode. default is no.
;alignmentdetection=yes ; enable this if you sometimes get 'white noise' on asterisk side of the call
; its a bug in the bluetooth adapter firmware, enabling this will compensate for it.
; default is no.
 
; The following is a list of the devices we deal with.
; Every device listed below will be available for calls in and out of Asterisk. 
; Each device needs an adapter=xxxx entry which determines which bluetooth adapter is used.
; Use the CLI command 'mobile search' to discover devices.
; Use the CLI command 'mobile show devices' to see device status.
;
 
; To place a call out through a mobile phone use Dial(Mobile/[device]/NNN.....) or Dial(Mobile/gn/NNN......) in your dialplan.
 
; To call a headset use Dial(Mobile/[device]).
 
[iphone]
 
address=00:1B:XX:XX:XX:XX	; the address of the phone
port=8				; the rfcomm port number (from mobile search)
context=from-mobile		; dialplan context for incoming calls
adapter=blue			; adapter to use
group=1				; this phone is in channel group 1
;nocallsetup=yes		; set this only if your phone reports that it supports call progress notification, but does not do it. Motorola L6 for example.



References

This article was HEAVILY plagarized from the references below, but I figured I'd try to gather the information in one place. Unfortunately chan_mobile does not have great documentation, the best documentation for it seems to be at Voip-info.org.

  1. Asterisk 1.6.0.6 on Debian 4.0
  2. Setup Asterisk 1.6 with DAHDI on Debian Etch
  3. chan_mobile - Voip-info.org
  4. chan-mobile for Asterisk®
  5. HOWTO build and configure chan_mobile on Trixbox
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