ATCOM APBX IP04 User's Guide

Unit 16:Unit 16: VoIP- 4D Primer - Building VoiceVoIP- 4D Primer - Building Voice Infrastructure in Developing RegionsInfrastructure in Develo

4.2 PSTNPSTN stands for public switched telephone network, “the telephone network of the telephone networks” or most commonly known as

A Foreign Exchange Station (FXS) is what is on the other side of a traditional telephone line. A FXS delivers the dial tone and ring tone to the phon

Unfortunately, there are many ways to generate these kind of signals. Each mechanism is known as a “signalling method”. Signalling methods vary from o

Three important things that SIP does are :1. Dealing with authentication2. Negotiating the quality15 of the phone call 3. Handling the IP addresses an

Network Address Translators (NATs) are the big enemies of RTP. A NAT-network consists of several computers that share one public IP address with the

The concept of trunking can be explained with the following metaphor: Imagine that you need to send five letters to people living

4.5.3 PSTN interface cardsIf you want to route calls from your VoIP terminals to the traditional telephone network (PSTN) you need to include dedicate

If you want to implement a network in a developing region you might consider using ATAs as they are normally cheaper than VoIP phones. ATAs are also

4.7 Quality of ServiceQuality of Service (QoS) is the ability of a network to provide improved (better) service to selected

VoIP appliances will allow you to set a “jitter buffer.” A jitter buffer is a shared data area where voice packets can be collected, stored, and sent

4.7.1 Latency...184.7

5.1.1 Installation TipsThis is a list of installation tips:If you need to install a TDM400P card• Be sure that your PC has an empty 2.2 PCI slot.• If

The approach we are taking in this short guide is not to include a listing of all possible commands but rather to walk through three basic scenarios w

6.2 Fetching Asterisk PackagesIt is also possible to get Asterisk pre-compiled. Pre-compiled software comes in the form of a “p

also do far more things that you do not expect. By keeping things simple you will learn slowly but steadily. 6.4 Basic Asterisk CommandsAsterisk ha

6.5 Configuration FilesThe number of configuration files that you need to edit in order to run Asterisk depends on the types of VoIP technologies that

Configuration file Description(always mandatory)/etc/asterisk/sip.conf Used to configure SIP based channels (SIP VoIP phones and SIP providers)/etc/

VIA or AMD Geode processors, these platforms have their limitations in terms of computational power and cost.In May 2007, I discovered the Free Teleph

During the time of writing (September 2007), the unit can be configured editing the configuration files via a serial cable or the network interface. T

Parameter SettingIP address of the VoIP phone 192.168.46.2IP address of the SIP Proxy (our PBX) 192.168.46.1Registration YESUser name/Auth name 462Cal

Instead of using a traditional fixed phone, we decide to connect a cordless DECT phone base station35 to the RJ-11 port of the ATA box. The result is

12.2 Limiting factors for IP telephony disemmination...4612.3 The jargon...

[iaxy_school]registerAssume that your local DHCP server assigns the IP address 192.168.46.100 to the IAXy. Then, from the Asterisk console run the fo

• Enable the possibility of receiving audio by the same port that we send audio. In the PBX:• Inform Asterisk that the softphone is inside of a NAT.A

In sip.conf, the following data should be added: [462]type=friend ; We can call and receive callssecret=462passcontext=internal_calls ;

qualify=yes ; We send dummy traffic to keep the NAT openIn iax.conf , the following data should be added:[464]type=friendsecret=464passcontext=inter

exten => 464,1,Dial(IAX2/464)exten => 466,1,Dial(IAX2/466)exten => t,1,Hangup() ; Special extension (Timeout)exten => i,1,Hangup() ; Spe

The second step is to ensure that the hardware drivers have been properly compiled and loaded. By running #lsmod you should see that the wctdm dri

Channel 01: FXS Loopstart (Default) (Slaves: 01)1 channels configured.Step 4: Configuring Asterisk to use the Zapata HardwareThe forth and final

exten => s,1,Answer() ; We answer the callexten => s,2,DigitTimeout(10) ; Setting Timeout values in secondsexten => s,3,ResponseTime

The process is simple; after powering off the PBX, we plug an FXS module into the second port of the TDM card. After powering on the syst

echotraining=yescontext=incoming_pstnsignalling=fxs_lschannel => 1context=internal_callssignalling=fxo_lschannel => 2Image 10. The Telecentre us

1. About this document This material is part of the course package created for TRICALCAR project. For information on TRICAL

exten => t,1,Hangup()include => internal_calls[internal_calls]exten => 461,1,Dial(Zap/2) ; Extension 461 calls via Zap channel 2exten =&

Image 11: The Telecentre and the Training Centre are equipped with one PBX each. The PBX's are Interconnected via a VSAT satellite link.9.1 Typi

tos = lowdelaydisallow = allallow = ulawallow = g729 ; We add the G.729 codecregister => server2:server2pass@training_voip.org; server2:server2pas

exten => s,1,Dial(Zap/2) ; Calls from the Training Centre ring ; the Telecentre Phone9.2.2 Training CentreThe iax.conf configuration file in the

In the Training Centre we decide that all calls coming from any Telecentre are forwarded using SIP to the support desk.[incoming_telecentres_calls]ext

services to digitally excluded areas, while promoting the creation of community operated and managed telephone networks.The samples files that we incl

During the review we have looked into three major areas:• Specialized Asterisk software distributions including graphical configuration tools (The Ast

• Many of the projects and tools have changed name during the last years and it is difficult to understand what exactly each of the tools is providing

12.4.1 FreePBX It is a PBX framework build at the top of asterisk that includes a GUI to manage a asterisk based telephone system. FreePBX grew up in

12.6 Other GUIs12.6.1 SwitchboxA company recently acquired by Digium (the company behind Asterisk) that has released the Swi

Wireless technologies come in many flavors and their performance depends on the particular application.It was not until spri

The following table summarizes our findings and positions the IP04 from the Free Telephony Project as the most mature low cost solution for embedded t

A big step towards the dissemination of IP Telephony can be found in the Free Telephony Project, a community project that has developed an open hardwa

13.2 The IP04 Open Hardware IP-PBXThe IP04 is a 4 port IP-PBX that runs Asterisk and uClinux on a powerful embedded Bl

for Linux. He has a broad range of telephony hardware, software, DSP, and management experience and has held executive level positions in the sat-com

13.3.1 Community development modelIt should be stressed that the IP04 is a community effort, with many people contributing. In no

Some changes to Asterisk were required to account for the lack of FPU and MMU on the Blackfin, for example porting of DTMF routines from floating poin

Bug counts have been very low and development cycles very fast due to re-use of existing open hardware modules. The IP04 was booting uClinux and

same models can apply to the developing world. In fact VOIP models may offer GSM providers opportunities to expand their network and bill

• Communication within organisations. Consider a university which has WiFi based Intranet but no fixed landlines. Rather than using GSM handset for in

14. Table of AbbreviationsAbbreviation DescriptionATA Analogue Telephone AdapterDECT Digital Enhanced Cordless TelecommunicationsFXO Foreign Exchange

• Private telephony in a rural community (Section 6)• Connecting the local telephone network to the PSTN (Section 7)• Interconnecting two remote commu

1st Edition (December 2006)16. Description of illustrationsPBX running AsteriskATAIAXYWireless router Wireless bridgeSwitchRouterAnalogue Phone DECT P

SoftphoneParabolic antennaVSATSatellite17. Intellectual Property RightsThe materials developed for the TRICALCAR project utilise a short version of th

• Share Alike. If you alter, transform, or build upon this work, you may distribute the resulting work only under the same or similar license to this

bandwidth is highly limited and the costs for Internet access are at least 100 times higher than in Europe and North America.8To get a sense of how b

To understand why open standards are important, let us start by providing a simple definition of a “standard.” A standard is a set of rules, condition

4. The recipeThis section summarizes the basic concepts behind VoIP. Understanding each of them will be very useful when you start configuring an