AVOXI - Asterisk SIP Configuration

Setting Up IP Whitelisting

When setting up your call forwarding to Asterisk it is important to whitelist AVOXI’s signaling IPs within Asterisk, which can be found here. The IP addresses to whitelist are contained in the SIP AVOXI to Customer row. 

Setting up a SIP End Point

Next, you’ll need to create a URI for AVOXI to use. What this looks like will depend on your business setup, how many Asterisk instances you have, and the level of resiliency you require.

Please note that this must be done at your DNS server level and will have to point to your public IP address assigned on your firewalls or SBC to your Asterisk PBX (IP address can be used directly as well on Genius Forward System).

Configuring a SIP URI To Point At Asterisk

Next, we will set up the SIP interface from AVOXI to Asterisk in your AVOXI Genius platform. This is done via Voice URIs.

In order to differentiate from any other Voice URIs that might point to your Asterisk, we’ll use a reserved keyword on our platform, “{E164}”, so that we can use the same voice URI for many different numbers and detect what number is called/who’s calling.

  1. First, log into AVOXI Genius, and navigate to the Numbers module 
  2. Click on the SIP URIs tab located next to Manage 
  3. Click on the ‘+ Add’ button to the right of the filter magnifying glass
  4. Clicking the ‘+ Add’ button will pop out the SIP URI configuration tool 
  5. The SIP URI configuration tool consists of 3 configurable fields and 1 auto-generated preview field.
  • Name: Meaningful name of the new SIP URI configuration
  • Protocol: A transport protocol for your SIP URI configuration. Genius currently supports UDP ( preferred ) and TCP. For more information about the differences between these two protocols, please refer here!  
  • URI: This is the configurable URI you will be using to set up your forwarding. There are three components. 
    • The defined number format that is expected from the dialed AVOXI Genius number ( known as DNIS ) to your destination, the two format options are e.164 with or without a ‘+’. 

  • Preview: This is a preview of your full SIP URI
  • Navigate to the number where you want to set your configured SIP URI 
  • Specify the Voice URI as {E164}@YourAsterisk.com  or {E164}@YourAsteriskExternalIP

Testing Calls

Any calls placed to the numbers associated with your URI are now delivered by AVOXI Genois to your Asterisk. If you used the {E164} keyword, Asterisk should see them as calls received to URI (called AVOXI DID)@YourAsteriskDomain. You should be able to do a packet capture to capture the traffic and see the incoming call.

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October 10th, 2022


Criss Soto

Updated By:

Jeff Cook



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sip , asterisk, sip end point, sip uri, uri, sip, whitelist

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