AudioCodes E-SBC User Manual page 979

CHAPTER 53 Viewing Performance Monitoring
● PM_gwSBCSRDNER: NER per SRD
If the configured NER minor or major thresholds are crossed, the device raises the SNMP
alarm, AcNERThresholdAlarm (OID 1.3.6.1.4.1.5003.9.10.1.21.2.0.113).
■ Average Call Duration (ACD): The ACD plus the session disconnect time (SDD) is the
duration from when the SIP 200 OK is received to when the SIP Bye message is sent. The
metric is calculated for both incoming and outgoing call legs. The metric includes the following
SNMP performance monitoring MIBs:
● PM_gwSBCACD: ACD for all (global) entities (i.e., all IP Groups and SRDs)
● PM_gwSBCIPGroupACD: ACD per IP Group
● PM_gwSBCSRDACD: ACD per SRD
If the configured ACD minor or major thresholds are crossed, the device raises the SNMP
alarm, acACDThresholdAlarm (OID 1.3.6.1.4.1.5003.9.10.1.21.2.0.112).
To view ACD in the Web interface, see
At any given time during a call, a voice metric can be in one of the following color-coded quality
states (as displayed in OVOC):
■ Green: Indicates good call quality
■ Yellow: Indicates fair call quality
■ Red: Indicates poor call quality
When the threshold of a voice metric is crossed, the device changes the alarm severity and
corresponding color-coded quality state of the call:
■ Minor Threshold (Yellow): Lower threshold that indicates changes from Green or Red to
Yellow.
■ Major Threshold (Red): Higher threshold that indicates changes from Green or Yellow to
Red.
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).
The following example is used to explain how the device considers threshold crossings. The
example is based on the ASR of a call, where the Major threshold is configured to 70%, the Minor
threshold to 90% and the hysteresis for both thresholds to 2%:
Mediant 1000 Gateway & E-SBC | User's Manual
Viewing Average Call Duration.
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