Avaya Administering Aura Session Manager Release 6.1 Manual de usuario descargar pdf (Pagina 252)

environment, Y is likely to be 83, because Avaya endpoints (as well as many others) use G.711-

Mu as their primary audio codec. For multimedia (video) users, a more complex analysis is

required as suggested below.

Example:

Given A = percentage of calls that are audio (ex: 80%) B = percentage of calls that are

multimedia (ex: 20%) C = average bandwidth used by an audio call (kbps) (ex: 83) D = average

bandwidth used by a multimedia call (kbps) (ex: 768).

Then Y = AC + BD kbps (ex: 220).

The calculated value Y allows approximately the same number of calls to be permitted for the

location after the CAC mode is changed from “Ignore SDP” (in Session Manager 6.0) to “Use

SDP” (in Session Manager 6.1). For example, to allow more than 20% of a location's available

bandwidth to be used by multimedia calls, after changing CAC modes you need to provision

the Multimedia Bandwidth value for the location to be 20% of the Total Bandwidth value.

Multimedia calls are rejected by CAC if the multimedia limit is exceeded regardless of other

call traffic. If you donot want to specify a specific limit on multimedia calls, the Multimedia

Bandwidth value may be left blank, and only the Total Bandwidth limit can be used.

2. For video endpoints used in Session Manager 6.0

In Session Manager 6.0, the average bandwidth used for audio calls and video calls need to

be determined separately, and then a location can be split into two locations and provisioned

accordingly. IP address ranges can be associated with different endpoint types for different

locations, and the desired bandwidth limit is split between the locations accordingly.

If Average Bandwidth per call for audio calls is 80 kbps, and Average Bandwidth per call for

video calls is 768 kbps for location “New York”, and the Managed Bandwidth for “New York” is

50 mbps, then “New York” is split into two locations.

• “New York Audio” has a Managed Bandwidth limit of 30 mbps and Average Bandwidth

per call limit of 80 kbps per call.

• “New York Video” has a limit of Managed Bandwidth of 20 mbps and Average Bandwidth

per call limit of 768 kbps per call.

Implications:

• The ratio of audio to video in these limits depends on the site analysis.

• This requires duplication of the logical location, as well as associated digit maps and other

administration.

• The IP address mapping of endpoints in the location is complex.

With current release, a single location can handle both audio and multimedia endpoints, and

enforce a single limit.

Immediately after clearing the Ignore SDP for Call Admission Control option (“Use SDP”

CAC mode), a user with split locations should recombine them as follows:

1. Ensure that digit maps and other administration associated with the two locations

(audio and video) other than the location administration page are identical. Note the

administration, including IP address patterns, for the video location. Reassign all

Managing Session Manager routing

252 Administering Avaya Aura

Session Manager November 2010

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