Direct Media Configuration

Last Updated : Aug 01, 2024 |
Direct media allows the media for IP calls to be routed directly between both ends of the call rather than through the IP Office system. This reduces the use of system bandwidth and other resources.
The use of direct media is subject to various checks during call setup. If these fail, the call continues to route through the IP Office system. Checks include for example:
  • Matching protocol (H323 or SIP).
  • Matching IP addressing type (IPv4 or IPv6).
  • Matching codec.
  • Matching security settings.
  • Matching DTMF settings.
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  1. Using either IP Office Manager or IP Office Web Manager in offline mode, load the system configuration.
  2. Select SystemSystem or System SettingsSystem.
  3. Select VoIP.
  4. The following settings affect the IP Office systems use of direct media:
    ADDITIONAL INFORMATION:
    Setting
    Description
    Ignore DTMF Mismatch For Phones
    Default = On
    When enabled, the IP Office system SIP and H323 extension settings include a Requires DTMF setting. For extensions where that setting is off (the default), the IP Office ignores the DTMF settings when checking if direct media is allowed.
    Allow Direct Media Within NAT Location
    Default = Off.
    When enabled, the system allows direct media between devices that reside behind the same NAT. That is, devices appear to the system with the same public IP address.
    The default is to apply this setting to both H323 and SIP remote workers and to IP Office lines.
    • For some routers, such as those with H323 or SIP ALG, it may be desirable to only allow direct media only between certain types of device. This can be configured by adding a MEDIA_NAT_DM_INTERNAL=X setting to the system's NoUser user Source Numbers. The value X is the sum of the following:
      • 1 = Include H323 phones.
      • 2 = Include SIP phones.
      • 4 = Include IP Office lines.
    • For example, if the router has SIP ALG that can't be disabled, you can disable NAT direct media for SIP devices using MEDIA_NAT_DM_INTERNAL=5 to include only H323 phones and IP Office lines.
    Disable Direct Media For Simultaneous Clients
    Default = Off (Use direct media)
    For IP deskphones, the Allow Direct Media Path setting of the extension entry in the IP Office configuration sets whether the device attempts to use direct media.
    Simultaneous clients, such as Avaya Workplace Client, can be used without having a extension entry in the system configuration. In that case, this setting controls whether those clients attempt to use direct media.
  5. If these settings need to be changed, do so and then save the configuration back to the system.
Related links
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