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Asterisk™ FAQs

»How do I configure the GXV3000 with Asterisk™?

»How do I configure Asterisk™ and my IP Phones to use Alert-Info to trigger distinctive ring tones?

»How do I configure the GXP2000 call features using Asterisk™?

»How do I configure Asterisk™ to enable paging using the "Paging Using" mode on the GXP2000, GXP2020, and GXV3000?

 

How do I configure the GXV3000 with Asterisk™?

The GXV3000 works well with the asterisk platform.  You have to enable the video support and turn on the related video codec in the Asterisk platform.  Ensure that the SIP.CONF is configured as follows: 

 

videosupport = yes

allow = h264

allow = h263

 

If you are using H.264, make sure you have Asterisk 1.4.x or a later version; if you are using H.263 video codec, please check that you have f/w 1.0.1.7 or later loaded in the GXV3000.

 

How do I configure Asterisk™ and my IP Phone to use Alert-Info to trigger distinctive ring tones?

The specified IP phones support Alert-Info mapping to three custom ring tone files.  For example, if you configure the distinctive ringing for custom ring tone 1 to “Family” (instead of a real user ID), that ring tone will be played if the phone receives an INVITE with an Alert-Info header in the following format:

Alert-Info: <http://www.example.com>;info=Family

On your IP phone, navigate to the Advanced Settings web configuration page and find the Distinctive Ring Tone section.  For each custom ring tone, enter the Alert-Info string (can be digits or text) to trigger the ring tone.  For example, you may enter “Family”.

On the Asterisk side, modify your extensions.conf file to add an Alert-Info header before dialing your IP phone.  For example, in Asterisk version 1.2:

exten => 853,1,Set(_ALERT_INFO=<http://127.0.0.1>\;info=Family)

exten => 853,2,Dial(SIP/853)

Or for Asterisk version 1.4:

exten => 853,1,SIPAddHeader(Alert-Info: <http://127.0.0.1>\;info=Family)

exten => 853,2,Dial(SIP/853)

 

How do I configure the GXP2000 BLF call feature using Asterisk™?

The GXP2000 standard busy lamp field (BLF) can be used with Asterisk™.  Click here for details.

 

How do I configure Asterisk™ to enable paging using the "Paging Using" mode on the GXP2000, GXP2020, and GXV3000?  Note:  Paging mode is accessed by pressing the menu key while the phone is off-hook.

In Asterisk, calls are generally dialed using a dialplan command such as:

exten => _2XX,1,Dial(SIP/${EXTEN},25)

To enable paging through pressing the menu key to get into the “Page Using” mode, two lines will need to be added before this command:

exten => _2XX,1,GotoIf($[“${SIP_HEADER(Call-Info)}”=”answer-after=0”]?2:3)

exten => _2XX,2,SIPAddHeader(Call-Info: answer-after=0)

exten => _2XX,3,Dial(SIP/${EXTEN},25)

The first line added checks to see if the phone designated the call as a page call.  If it is, Asterisk jumps to priority 2, where Asterisk itself designates the call as a page call; otherwise it jumps to priority three.  Please be aware that original Dial command needs to have the priority increased by two, as there are now two commands ahead of it.