AudioCodes E-SBC User Manual page 346

CHAPTER 17 Quality of Experience
Once configured, you can apply Bandwidth Profiles to specific calls, by assigning them to any of
the following configuration entities:
■ IP Groups (see
■ Media Realms (see
■ Remote Media Subnets (see
Each time a configured bandwidth threshold is crossed, the device can do the following, depending
on configuration:
■ Reject calls destined to the IP Group or use an alternative IP Profile for the IP Group. For more
information, see
■ Use an alternative routing rule for alternative routing. If a call is rejected due to a crossed
threshold, the device generates a SIP 806 response. You can configure the SIP response code
as a reason for alternative routing (see
Routing Reasons).
■ Send an SNMP alarm (acMediaRealmBWThresholdAlarm). The device clears the alarm when
bandwidth utilization returns to normal (Green).
AudioCodes One Voice Operations Center (OVOC) displays bandwidth utilization using color-
coded states:
■ Green: Indicates bandwidth utilization is within normal range.
■ Yellow: Indicates bandwidth utilization is encroaching on "total" bandwidth, serving as a
warning (or it could also mean that bandwidth utilization has dropped below the red state).
■ Red: Indicates that bandwidth utilization has exceeded total bandwidth.
Bandwidth Profiles let you configure bandwidth thresholds, which when crossed changes the color-
coded state for bandwidth utilization:
■ Green-Yellow (Minor) Threshold: Lower threshold configured as a percentage of the
configured major (total) bandwidth threshold. When bandwidth goes over the threshold, the
device considers it a Yellow state (Minor alarm severity); when it goes below the threshold, it
considers it a Green state (cleared alarm).
■ Yellow-Red (Major) Threshold: Upper threshold configured by the major (total) bandwidth
threshold. When bandwidth goes over the threshold, the device considers it a Red state (Major
alarm severity); when it goes below the threshold, it considers it a Yellow state (Minor alarm
severity).
The device also uses hysteresis to determine whether the threshold has indeed being crossed.
Hysteresis defines the amount of fluctuation from the threshold in order for the threshold to be
considered as crossed (i.e., change in color state). Hysteresis is used to avoid false reports being
sent by the device. Hysteresis is used only for threshold crossings toward a lesser severity (i.e.,
from Red to Yellow, Red to Green, or Yellow to Green). Hysteresis is configured as a percentage of
the configured major (total) bandwidth threshold.
The following example is used to explain how the device considers threshold crossings. The
example is based on a setup where the Major (total) bandwidth threshold is configured to 64,000
Kbps, the Minor threshold to 50% (of the total) and the hysteresis to 10% (of the total):
Configuring IP Groups)
Configuring Media Realms)
Configuring Remote Media
Configuring Quality of Service
Configuring SIP Response Codes for Alternative
- 308 -
Mediant 1000 Gateway & E-SBC | User's Manual
Subnets)
Rules.