Direct media

Usually, when two phones have a conversation, the media (the voice and video packets) flows from one phone to the Wazo Platform, then to the second phone. Direct media makes the media flow directly from one phone to another, without the Wazo Platform intermediate. This is useful when the Wazo Platform is not on premise, and the two phones are in the same network.

Setup

By default, direct media is disabled for all phones. To enable, you need to set an option in the endpoint configuration:

direct_media: yes

You may also set this option on the tenant PJSIP template global to apply this to all phones of a tenant.

Note: To configure direct media on SCCP, see SCCP Direct Media

Limitations

In order to be effective, the direct media requires:

• the packetization (length of the RTP media packets) to be identical between the two phones. The usual packetization time is 20 ms.
• the DTMF features featuremap to be disabled: this includes transfers and hangup via DTMF. For this, create a file /etc/asterisk/features.d/50-disable-featuremap.conf:

  [featuremap]
  blindxfer =
  disconnect =
  atxfer =

  Then execute the following command:

  asterisk -rx 'module reload features'