OpenVox AE810E DAHDI en

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The Definition of Asterisk is described as follows: Asterisk is a complete PBX in software. It runs on Linux, BSD, Windows (emulated) and provides all of the features you would expect from a PBX and more. Asterisk does voice over IP in four protocols, and can interoperate with almost all standard-based telephony equipment using relatively cost-effective hardware. Asterisk provides Voicemail services with Directory, Call Conferencing, Interactive Voice Response, Call Queuing. It supports three-way calling, caller ID services, ADSI, IAX, SIP, H323 (as both client and gateway), MGCP (call manager only) and SCCP/Skinny (voip-info.org).

1.2 What is AE810E

AE810E is a new generation analog card with interchangeable quad-FXS and quad-FXO modules and AE810E is an A810E with Octasic® Hardware Echo Cancellation Module on board. It can eliminate the requirement for separate channel banks or access gateways. The AE810E contains 2 module banks. Each bank supports 4 RJ-11 interfaces. The module banks may be filled with up to 4 quad-FXO or quad-FXS modules enabling the creation of any combination of ports. Scaling of an analog card solution is accomplished by simply adding additional cards. AE810E works well with Asterisk®, Elastix®, FreeSWITCH™, PBX in a Flash, trixbox®, Yate™ and IPPBX/IVR projects as well as other Open Source and proprietary PBX, Switch, IVR, and VoIP gateway applications.

Target applications

Channel Bank Replacement / Alternative
Small Office Home Office (SOHO) applications
Small and Medium Business (SMB) applications
Gateway Termination to analog telephones/lines

Chapter 2 Hardware Setup

There are some points that should be paid attention to when set up AE810E.

2.1 Power supply

The board should be always powered no matter what modules are installed, please connect the power source with AE810E board by a 4-pin power source connector.

2.2 Slot compatibility

AE810E is compatible with any standard type of PCI-E ×1, ×2, ×4, ×8, and × 16 slot while PCI slot is not fit for it; you should confirm your slot type and insert AE810E into a type of PCI-E slot.

2.3 Timing cable

If you have just one card in the system, all channels on that card have already run under the same clock source, so timing cable is unnecessary. But if there are more than one card, using timing cable has some advantages. Before using the clock line, each card works on its own clock, therefore precision of the clock is limited; each card will send /receive voice data at different speeds. In voice usage, this small issue can be omitted, but in data communication such as Fax/Modem, it will cause big problem. Data loss will cause communication broken or fax broken. Timing cable will force all cards to work at the same clock source, send data at the same speed, as a result no data will lost.

If you found J914 (input) and J915 (output) interfaces on the card, it means the card supports clock line, for the details, please refer to http://bbs.openvox.cn/viewthread.php?tid=874&extra=page%3D1

2.4 FXO and FXS modules

FXO (Foreign eXchange Office) is the office end of the line, and FXS (Foreign eXchange Station) is the station end, there is so much difference between them, they can be identified by color, the former ones are red and the latter ones are green. FXO modules use FXS signaling while FXS modules use FXO signaling. A FXO-400 module corresponds to four FXO interfaces which receive power (battery) and ring signals, and a FXS-400 module corresponds to four FXS ports which provides power (battery) and generates ring signals.

2.5 Hardware setup procedure

Power off your PC, remember unplug the AC power cable
Insert AE810E into a PCI-E slot
Put timing cable correctly if necessary, for more details, please refer to http://bbs.openvox.cn/viewthread.php?tid=874&extra=page%3D1;
Fix the board by a screw
Please plug PSTN lines into FXO ports and extension telephone lines into FXS interfaces before you have detected your PSTN line works well.
Power on PC

Caution: During the above processes, an ESD wrist strap is needed. Once power is on, you must not attempt to install or take down the board. Do not forget to connect PSTN lines into analog phones directly to make sure the lines are available before inserting the PSTN lines into FXO ports. After hard ware setup, it is time to install software.

Chapter 3 Software Installation and Configuration

AE810E supports DAHDI software driver on Linux. To make full use of AE810E, you should download, compile, install and configure DAHDI and Asterisk. Let’s make the specific DAHDI and Asterisk version for an example to explain how to install software.Let’s make the specific DAHDI and Asterisk versions for an expatiation.

3.1 Download

DAHDI software packages are available on OpenVox official website or Digium. Some patches should be added while the driver sources are from Digium, therefore, it is recommended that downloading the DAHDI driver package from OpenVox official website.

Gain DAHDI source package from OpenVox: http://downloads.openvox.cn/pub/drivers/dahdi-linux-complete/releases/1.3.2/openvox_dahdi-linux-complete-2.3.0.1+2.3.0.tar.gz
Get Asterisk software package from Digium official website: http://downloads.asterisk.org/pub/telephony/asterisk/releases/asterisk-1.8.0.tar.gz

Execute the following commands under the directory of /usr/src/ in general, the former two below are used for downloading these two packages and the later two are for unzipping them.

# wget http://downloads.openvox.cn/pub/drivers/dahdi-linux-complete/releases/1.3.2/openvox_dahdi-linux-complete-2.3.0.1+2.3.0.tar.gz
# wget http://downloads.asterisk.org/pub/telephony/asterisk/releases/asterisk-1.8.0.tar.gz
# tar -xvzf openvox_dahdi-linux-complete-2.3.0.1+2.3.0.tar.gz
# tar -xvzf asterisk-1.8.0.tar.gz

3.2 Installation

1. Hardware detection

# lspci –vvvv

Check the outcome and confirm your system has recognized AE810E. If it has been recognized, "communication controller" will be displayed in the output information like that:

01:02.0 Communication controller: Device 1b74:0810 (rev 01)
       Subsystem: Device 1b74:0001
       Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
       Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=slow >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
       Latency: 64, Cache Line Size: 16 bytes
       Interrupt: pin A routed to IRQ 225
       Region 0: Memory at ded80000 (32-bit, non-prefetchable) [size=512K]
       Kernel driver in use: opvxa24xx
       Kernel modules: opvxa24xx

If AE810E is not recognized by the system, you have to power off and take out the card, then try to insert it into other PCI-E slot.

2. Software installation
Some dependencies are crucial. If any of them is absent, the software installation process would not go through successfully. Let’s run "yum install XX" (XX stands for the dependency’s name) to check the availability of dependencies.

# yum install bison 
# yum install bison-devel 
# yum install ncurses 
# yum install ncurses-devel 
# yum install zlib 
# yum install zlib-devel 
# yum install openssl 
# yum install openssl-devel 
# yum install gnutls-devel 
# yum install gcc 
# yum install gcc-c++ 
# yum install libxml2

If there is no kernel source in the system, you should also install it by running like: # yum install kernel-devel
If the dependency has been installed, system indicates that nothing to do which means you could go to next one directly. Otherwise, the system will keep on installing it.

Change to the directory dahdi-linux-complete-XX (XX represents DAHDI version), then perform commands one by one to install DAHDI.

# cd /usr/src/dahdi-linux-complete-XX 
# make
# make install 
# make config

Caution: If there is something wrong after "make", please refer to HERE. In the url link, the moderator introduces you a method how to patch. After patching, save your changes and exit. Then run "make" again, if successfully, you are going to install Asterisk.

Please operate those commands to install Asterisk.

# cd asterisk-1.8.0
# ./configure
# make 
# make install
# make samples

"make samples" will install the standard sample configuration file in the directory /etc/asterisk. As a freshman, you should perform make samples, that is to say, it is unnecessary to perform make samples every time. Because once performed, it will cover the old sample configuration files you have installed.

3.3 Configuration

1. Driver loading
After compiling and installing DAHDI and Asterisk, please load the driver by running:

# modprobe dahdi
# modprobe opvxa24xx opermode=CHINA
# dahdi_genconf

After running "modprobe dahdi" or "modprobe opvxa24xx opermode=CHINA", there is not any indication information displayed if loaded normally and successfully. "opvxa24xx" is the driver module name of AE810E. "opermode" applies to FXO port and is invalid for FXS port, and you are allowed to take place of "CHINA" to other mode name which is available in the file: ../dahdi-linux-XX/linux/drivers/dahdi/fxo_modules.h
If there is any error, please trace the cause. Until all errors are clear up, you could execute "dahdi_genconf" again, and then go to the next step. By running "dahdi_genconf", it will generate /etc/dahdi/system.conf and etc/asterisk/dahdi-channels.conf automatically. Checking whether the generated files information agrees with your hardware setup, if not, you should modify to your specific requirements. Do not forget to confirm dahdi-channels.conf is included in chan_dahdi.conf, if not, run command:

# echo "#include dahdi-channels.conf" >> /etc/asterisk/chan_dahdi.conf

FXO ports use FXS signaling, while FXS ports adopt FXO signaling. A part of system.conf which is one of the basic channel configuration files is displayed.

# Span 1: OPVXA24XX/24 "OpenVox A810E Board 25" (MASTER)
fxoks=1
fxoks=2
fxoks=3
fxoks=4
fxsks=5
fxsks=6
fxsks=7
fxsks=8

# Global data

loadzone        = us
defaultzone     = us

2. Country mode modification
In order to match your country pattern, you need to change parameters loadzone and defaultzone to your country. For example, your system is in CHINA, you would like them change to:

loadzone = cn 
defaultzone = cn

Some zonedata is available in the file .. /dahdi-XX/tools/zonedata.c, you can refer to it to match your country mode. Meanwhile, you also need to modify another parameter which is in file /etc/asterisk/indications.conf.

country=cn

A part of file /etc/asterisk/dahdi-channels.conf is showed as below. (Modification, if it is not agree with the hardware setup)

; Span 1: OPVXA24XX/24 "OpenVox A810 Board 25" (MASTER)
;;; line="1 OPVXA24XX/24/0 FXOKS"
Signalling=fxo_ks           // FXS modules use FXO signaling
callerid="Channel 1" <4001>
mailbox=4001
group=5
context=from-internal
channel => 1
callerid=
mailbox=
group=
context=default

;;; line="2 OPVXA24XX/24/1 FXOKS"
signalling=fxo_ks
callerid="Channel 2" <4002>
mailbox=4002
group=5
context=from-internal
channel => 2
callerid=
mailbox=
group=
context=default
……
……
……
;;; line="5 OPVXA24XX/24/4  FXSKS"
signalling=fxs_ks               //FXO ports use FXS signaling
callerid=asreceived
group=0
context=from-pstn
channel => 5
callerid=
group=
context=default    

;;; line="6 OPVXA24XX/24/5  FXSKS"
signalling=fxs_ks
callerid=asreceived
group=0
context=from-pstn
channel => 6
callerid=
group=
Context=default
……
……
……
……

After modifying the country mode, please execute the following command:

# dahdi_cfg –vvvvvv

The command is used for reading and loading parameters in the configuration file system.conf and writing to the hardware. A part of outputs are showed in the following figure.

Channel map:

Channel 01: FXO Kewlstart (Default) (Echo Canceler: none) (Slaves: 01)
Channel 02: FXO Kewlstart (Default) (Echo Canceler: none) (Slaves: 02)
Channel 03: FXO Kewlstart (Default) (Echo Canceler: none) (Slaves: 03)
Channel 04: FXO Kewlstart (Default) (Echo Canceler: none) (Slaves: 04)
Channel 05: FXS Kewlstart (Default) (Echo Canceler: none) (Slaves: 05)
Channel 06: FXS Kewlstart (Default) (Echo Canceler: none) (Slaves: 06)
Channel 07: FXS Kewlstart (Default) (Echo Canceler: none) (Slaves: 07)
Channel 08: FXS Kewlstart (Default) (Echo Canceler: none) (Slaves: 08)

8 channels to configure.

Setting echocan for channel 1 to none
Setting echocan for channel 2 to none
Setting echocan for channel 3 to none
Setting echocan for channel 4 to none
Setting echocan for channel 5 to none
Setting echocan for channel 6 to none
Setting echocan for channel 7 to none
Setting echocan for channel 8 to none

3. Asterisk initiation

# asterisk –vvvvvvvgc

If Asterisk is already activate, run "asterisk –r" instead. In the CLI, please run the following command:

localhost*CLI> dahdi show channels
Chan Extension  Context    Language   MOH Interpret  Blocked    State
pseudo           default             default                 In Service
Pseudo          default                     default
      1         from-internal               default
      2         from-internal               default
      3         from-internal               default
      4         from-internal               default
      5         from-pstn                   default
      6         from-pstn                   default
      7         from-pstn                   default
      8         from-pstn                   default

If DAHDI channels are found, it means they have been loaded into Asterisk. You are going to edit dialplan by your requirements.

4. Dialplan edit
Users must make sure that the context "from-pstn" and "from-internal" are in extensions.conf, here a simple example is given:

# vim /etc/asterisk/extensions.conf
[from-pstn]
exten => s,1,Answer() 
exten => s,n,Dial(dahdi/1,,r) 
exten => s,n,Hangup()

[from-internal]
exten => 200,1,Dial(dahdi/7/outgoing_number) 
exten => 200,2,Hangup()

You should write the destination number instead of the outgoing_number in the above dial plan. The dial plan achieves that when an extension telephone dials 200, Asterisk will transfer through channel 7 to the destination. While a call comes from PSTN line, Asterisk answers firstly, and then gets through to the extension set which connects to channel 1.

After saving your dialplan, please run "asterisk –r", then execute "reload" in the CLI. Next you are able to make calls.

Additional function
Users should run command "cat /proc/interrupts" to check AE810E has independent interrupt. If AE810E shares interrupt with other devices, it may cause some problems even cannot work normally. While AE810E allows users to modify interrupt pin during firmware upgrade for avoiding interrupt conflict.

Chapter 4 Reference

www.openvox.cn
www.digium.com
www.asterisk.org
www.voip-info.org
www.asteriskguru.com

OpenVox AE810E DAHDI en

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Contents

Test Environments

Chapter 1 Overview

1.1 What is Asterisk