Asterisk Cookbook: Solutions to Everyday Telephony Problems by Leif Madsen PDF

By Leif Madsen

ISBN-10: 144930382X

ISBN-13: 9781449303822

Asterisk has a wealth of beneficial properties that will help you customise your PBX to fill very particular enterprise wishes. This brief cookbook bargains recipes for tackling dialplan basics, making and controlling calls, and tracking channels on your PBX setting. every one recipe incorporates a easy code resolution you could positioned to paintings instantly, in addition to a close dialogue that provides perception into why and the way the recipe works.

Show description

Read or Download Asterisk Cookbook: Solutions to Everyday Telephony Problems PDF

Similar data in the enterprise books

New PDF release: Using MPI-2: Advanced Features of the Message Passing

The Message Passing Interface (MPI) specification is accepted for fixing major medical and engineering difficulties on parallel desktops. There exist greater than a dozen implementations on computing device structures starting from IBM SP-2 supercomputers to clusters of computers operating home windows NT or Linux ("Beowulf" machines).

New PDF release: Efficient Test Methodologies for High-Speed Serial Links

With the expanding call for for larger info bandwidth, communique structures’ information premiums have reached the multi-gigahertz variety or even past. Advances in semiconductor applied sciences have sped up the adoption of high-speed serial interfaces, reminiscent of PCI-Express, Serial-ATA, and XAUI, to be able to mitigate the excessive pin-count and the data-channel skewing difficulties.

Get Social Media, Crisis Communication and Emergency Management: PDF

Even though contemporary worldwide failures have in actual fact established the facility of social media to speak severe info in real-time, its actual power has but to be unleashed. Social Media, obstacle verbal exchange, and Emergency administration: Leveraging net 2. zero applied sciences teaches emergency administration pros tips to use social media to enhance emergency making plans, preparedness, and reaction features.

Download PDF by Stamatios V. Kartalopoulos: Understanding Sonet/Sdh and Atm: Communications Networks for

''Optical communications and fiber know-how are quickly turning into key ideas for the expanding bandwidth calls for of the twenty first century. This introductory textual content offers practising engineers, managers, and scholars with an invaluable advisor to the newest advancements and destiny developments of 3 significant applied sciences: SONET, SDH, and ATM, and a quick advent to legacy TDM communications platforms.

Additional info for Asterisk Cookbook: Solutions to Everyday Telephony Problems

Example text

Info There are a few more useful optional headers that can be provided with the Origi nate action: ActionID: This is a custom value that will also be included in any responses to this request. It can be helpful in custom applications that may have many outstanding requests at any one time to ensure that responses are associated with the proper request. Variable: NAME=VALUE This header can be specified multiple times in an Originate request. It will set channel variables on the outbound channel.

Conf file, you configure phone numbers, not devices, for the application to call. We specify a 20 second timeout for this outbound call attempt. Finally, we set a couple of options. The first option is r, which ensures that Asterisk generates a ringback tone. We want this because we have already indicated to the caller that we will be providing early media. An alternative to this would be to use the m option of Dial(), which would provide hold music instead of ringback. Finally, we use the U option, which executes a GoSub() routine on the called channel after it answers, but before connecting it to the inbound channel.

In addition to changing the volume prior to calling an application, with the p option we can permit the VOLUME() function to listen for DTMF to adjust the volume of the channel. To increase volume, use the * key. To lower the volume, use the # key. With our current dialplan, the DTMF can be adjusted by the caller, which may not necessarily be what we want. info need to execute a subroutine on the other channel just prior to bridging. We can do this with the U() option to the Dial() application: exten => 100,1,Verbose(2,Incoming call from ${CALLERID(all)}) same => n,Dial(SIP/0000FFFF0001,30,U(VolumeAdjustment^3)) same => n,Hangup() exten => s,1,Verbose(2,Adjusting volume for other channel) same => n,Set(VOLUME(RX,p)=${ARG1}) same => n,Return() We could use the IF() function to control whether the subroutine is executed by the Dial() application: same => n,Dial(SIP/0000FFFF0001,30,${IF($[${CALLERID(num) = 12565551212]?

Download PDF sample

Asterisk Cookbook: Solutions to Everyday Telephony Problems by Leif Madsen


by Joseph
4.2

Rated 4.88 of 5 – based on 28 votes