System scalability and expansion
79
For the Music on Hold, or Announcements service, a pooled entity is
made up of one-to-two Media Application Servers. This Pooled Entity is
considered one service instance (when the Session Managers are included).
The capacity of a service instance can be increased by adding more Media
Application Servers to the pooled entity. You can add a maximum of two
Media Application Servers for each Music on Hold, or Announcements
pooled entity. You can also increase the capacity of a service by increasing
the number of pooled entities in the network. This type of scaling is required
when you require more capacity (storage or processing) than can be
achieved using one pooled entity.
Your network may contain multiple service instances, of the Music on Hold
or Announcements service, that are separated by considerable distance. If
this is true, you want to avoid the cost of backhauling to a remote service
instance when one is available locally. You can ensure that local service
instances are always used, by assigning service packages to subdomains.
Note: For more information about setting up sub domains and assigning
service packages to sub domains, see Provisioning Client User Guide
(NN10255-191).
Figure 22 "Using sub domains to map users to local service instances"
(page 80)
gives a high-level view of how a sub domain can be mapped to a
group of users, and to a local service instance (entity pool).
Nortel Media Application Server
Media Application Server Planning and Engineering
NN42020-201
01.04
Standard
4.0
27 July 2007
Copyright © 2007, Nortel Networks
.
