User's Manual
Avaya Branch Gateway Manager 10.0 Page 176
15-601011 Issue 29r (Friday, November 02, 2012)B5800 Branch Gateway
5.3.8.1 Configuration
This form is used for general configuration related to system alarms. For email alarms the SMTP tab is also used.
Usability
· Mergeable: These settings are not mergeable. Changes to these settings will require a reboot of the system.
Configuration Settings
· SNMP Enabled: Default = Off
Enables support for SNMP. This option is not required if using SMTP or Syslog.
· Community (Read-only): Default = public
The SNMP community name to which the system belongs.
· SNMP Port: Default = 161. Range = 0 to 65534.
The port on which the system listens for SNMP polling.
· Device ID
This is a text field used to add additional information to alarms.
If an SSL VPN is configured, Avaya recommends that the Device ID match an SSL VPN service Account Name.
Each SSL VPN service account name has an associated SSL VPN tunnel IP address. Having the displayed Device ID
match an SSL VPN service account name helps identify a particular SSL VPN tunnel IP address to use for remotely
managing IP Office.
· Contact
This is a text field used to add additional information to alarms.
· Location
This is a text field used to add additional information to alarms.
· QoS Parameters:
These parameters are used if Enable RTCP Monitor on Port 5005 is selected (Systems | LAN1 | VoIP ). They
are used as alarm thresholds for the QoS data collected by the system for calls made by Avaya H.323 phones and for
phones using VCM channels. If a monitored call exceeds any of the threshold an alarm is sent to the System Status
application. Quality of Service alarms can also be sent from the system using Alarms .
· The alarm occurs at the end of a call. If a call is held or parked and then retrieved, an alarm can occur for
each segment of the call that exceeded a threshold.
· Where a call is between two extensions on the system, it is possible that both extensions will generate an
alarm for the call.
· An alarm will not be triggered for the QoS parameters recorded during the first 5 seconds of a call.
· Round Trip Delay (msec): Default = 350.
Less than 160ms is high quality. Less than 350ms is good quality. Any higher delay will be noticeable by those
involved in the call. Note that, depending on the compression codec being used, some delay stems from the signal
processing and cannot be removed: G.711 = 40ms, G.723a = 160ms, G.729 = 80ms.
· Jitter (msec): Default =20.
Jitter is a measure of the variance in the time for different voice packets in the same call to reach the destination.
Excessive jitter will become audible as echo.
· Packet Loss (%): Default = 3.0.
Excessive packet loss will be audible as clipped words and may also cause call setup delays.
Round Trip Delay
Good Quality
High Quality
Round Trip Delay
< 350ms
< 160ms
Jitter
< 20ms
< 20ms
Packet Loss
< 3%
< 1%
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