AudioCodes Mediant 500 E-SBC, Руководство пользователя

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User's Manual 16. Quality of Experience
Version 6.8 247 Mediant 500 E-SBC
16.4 Configuring Media Enhancement Profiles
Media Enhancement Profiles provides support for access control and media quality
enhancements based on call quality measurements (configured in ''Configuring Quality of
Experience Profiles'' on page
240 ) and bandwidth utilization (configured in ''Configuring
Bandwidth Profiles'' on page 244 ). These profiles contain color-coded thresholds that are
used to trigger access control and/or media enhancements.
The Media Enhancement Profile table lets you configure any one of the following actions
when a specific color-coded threshold (Green-Yellow or Yellow-Red) is crossed for a
specific monitored voice metrics (e.g., MOS) or bandwidth (e.g., Egress Audio Bandwidth):

Reject new calls until the voice metrics or bandwidth returns to below the threshold.
This can be used, for example, to reject new calls when bandwidth threshold is
exceeded.

Use a different IP Profile. For example, if packet loss is detected, the IP Group (to
which the Media Enhancement Rule is later assigned) can switch to an IP Profile
configured with a higher RTP redundancy level. The ability to use a different IP Profile
when call quality or bandwidth thresholds are crossed provides a wide range of
options for media enhancement and traffic shaping. For example, it may be used to:
•
switch to a low bit-rate coder,
•
negotiate different p-time (and perform transrating if required),
•
increase RTP redundancy level,
•
or block video calls.

Accept calls
A Media Enhancement Profile can later be assigned to an IP Group (in the IP Group table).
However, when the device analyzes the call and determines whether Media Enhancement
Profile should be applied or not, it searches for the "most relevant" Quality of Experience
Profile or Bandwidth Profile in the following order: 1) Remote Media Subnet, 2) Media
Realm, and then 3) IP Group. Thus, a Media Enhancement Profile associated with a
specific IP Group may actually "respond" to Quality of Experience or bandwidth thresholds
crossed at the Media Realm or Remote Media Subnet level.
Notes:
•
The color-coded threshold is first calculated for the IP Group and only then for the
Media Realm. The device uses the "worst" color-coded threshold crossing. For
example, if a Media Realm crossed a Green-Yellow threshold and an IP Group a
Yellow-Red threshold, the action defined for the Red color state is used.
•
The device applies Media Enhancements Profiles on new calls only , based on the
information gathered from previous and/or currently established calls.
The following procedure describes how to configure Media Enhancement Profiles in the
Web interface. You can also configure Media Enhancement Profiles using other
management platforms:

Media Enhancement Profile table: Table ini file parameter,
MediaEnhancementProfile or CLI command, configure voip/qoe media-enhancement

Media Enhancement Rules table: Table ini file parameter, MediaEnhancementRules
or CLI command, configure voip/qoe media-enhancement-rules