Nortel MAS, Справочное руководство

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114 Capacities
permitted on a server once this limit is reached. Alarms are issued as the
service nears the exhaustion of its allotted License Keys (see
Table 30
"License key exhaustion thresholds" (page 114) .
Table 30
License key exhaustion thresholds
• G729LicenseThreshold MINOR Nearing exhaustion
• G711LicenseThreshold MINOR Nearing exhaustion
•
G729LicenseExhausted MAJOR Exhausted
•
G711LicenseExhausted MAJOR Exhausted
The current values of the used License Keys and the maximum number
available displayable using MAS console are:
• NumG711LicensesInKey
•
NumG711LicensesInUse
• NumG729LicensesInKey
• NumG729LicensesInUse
The license keys limit the number of simultaneous participants active at
one time. End users are never allocated more licences (G.711, G.729 or
combination G.711/G.729) than a server handles. When both CODECs are
offered for a conference leg or segment, the Ad hoc audio conferencing
service selects the CODEC, based on the CODEC preference (least number
of processing units) and the available licenses.
A server can accept a new conference only when adequate licenses are
available. The server cannot exceed its engineering limits. If any of these
limits are exhausted, the INVITE is rejected with a SIP 480
Temporarily
Unavailable Response
message. The Session Manager advances to
the next Media Application Server (if one is available).
License keys impact on Music on Hold and Announcements services
Ports are allocated on a first-come, first-served basis until the license
keys are exhausted or the available capacity is exceeded. Licenses are
configured on a per-service basis (on a given server) and the license
availability for the Announcements service is not related to the availability of
licenses for the Music on Hold service. The reverse is also true.
The system capacity is limited by the use of License key values. Maximum
capacity values are enforced through use of License keys so that
engineering limits are not exceeded during normal operation. The system
is engineering to work at 60% to 70% capacity, depending on call model.
This allows the system to gracefully handle spikes in usage. A maximum
Nortel Media Application Server
Media Application Server Planning and Engineering
NN42020-201 01.04 Standard
4.0 27 July 2007
Copyright © 2007, Nortel Networks
.