AUTO-DIAL SYSTEM Presented by, AKASH ANANTHANARAYANAN SANJEEVAKUMAR DEVARAJA

INTRODUCTION Auto Dial system calls many users automatically. Many ways to initiate calls, we use here the call file method. It works using call files. When the call files are placed in a special directory known as the spool directory the calls are originated automatically. When the user picks up the call there are many possible options. A recorded message could be played to the user.

RESOURCES USED One virtual Machine. One computer. Three Digium Phones. Head Phones.

FLOW CHART

WORK DONE Call Files Parameters are necessary to initialize the call 1. Channel 2. Caller ID 3. Wait Time 4. Max Retries 5. Retry Time

CONT… Once the receiver picks up the call, the following parameters are to be initialized: 1.Context: 2.Extension: 3.Priority: 4.Application : 5.Data:

PROBLEMS ENCOUNTERED During execution we faced few problems; 1.Unable to set the utime in the /var/spool/asterisk/outgoing/ 2.Unable to reach the host101 3.Unable to request channel SIP/101

TROUBLESHOOTING We revised the parameters in call as there were some errors So, we removed some such as the retry, maxretries parameters and included Application and Data. We used another way to initiate calls from the Asterisk CLI using the command channel originate. Channel originate SIP/0000FFFF0000 Playback soundfile.wav The solution to our problem was to replace the extension numbers with the MAC address.

Demonstration

APPLICATIONS Predictive calling in call centers where multiple operators are making simultaneous calls is another real time application of Auto Dialer. Conducting political, business Surveys through the telephones. In Telemarketing Industry in order to make 2000 simultaneous phone calls, for example, a group of computers have to be linked together to provide the support for that many phone lines using a single server and 100 mbps connection.

CONCLUSION This system is very efficient and hence is widely used to auto dial numbers. As we have seen it is not very complex and can be done with minimum effort to originate hundreds of calls within a given time limit. We had decided to create an iax2 trunk but unfortunately the channel was having some problems and it was not going online. Hence we decided to do the auto dial system within a single server.

REFERENCES VoIP – Info.org Asterisk: The Definitive Guide (3 rd Edition)

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