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Call processing
140 Avaya Application Solutions IP Telephony Deployment Guide
Figure 49: Typical home/edge configuration
Multi-home multi-Communication Manager system
The multi-home system is a distributed version of the home/edge system where the edge is a
separate host from the home servers, which are deployed for the user base. The home servers
provide service to endpoints and are associated with one or more Communication Manager
hosts. The ethernet topology is orthogonal to the SIP topology. There are no restrictions or
requirements on the network beyond existing preferred network setup for VOIP. The only area
where SIP is concerned is access to external domains.
separate host from the home servers, which are deployed for the user base. The home servers
provide service to endpoints and are associated with one or more Communication Manager
hosts. The ethernet topology is orthogonal to the SIP topology. There are no restrictions or
requirements on the network beyond existing preferred network setup for VOIP. The only area
where SIP is concerned is access to external domains.
on page 141 shows an ALG between the Edge
node and the service-provider cloud.
The ALG and/or the Edge node may be deployed in the customer's DMZ if they so wish. The
multi-home distributed network provides scalability through user distribution, i.e. a user has only
one home. To increase the size of the entire system, more home nodes are added until the edge
reaches maximum capacity. Any calls that are not to a user local to the home of the originating
caller are routed through the edge node.
Starting in release 2.1, any SES node on the network may be a duplicated system. There are no
constraints on which nodes must be duplicated. For example, the edge and one home may be
duplicated systems and the others may not be; it makes no difference because the node is one
logical entity.
The ALG and/or the Edge node may be deployed in the customer's DMZ if they so wish. The
multi-home distributed network provides scalability through user distribution, i.e. a user has only
one home. To increase the size of the entire system, more home nodes are added until the edge
reaches maximum capacity. Any calls that are not to a user local to the home of the originating
caller are routed through the edge node.
Starting in release 2.1, any SES node on the network may be a duplicated system. There are no
constraints on which nodes must be duplicated. For example, the edge and one home may be
duplicated systems and the others may not be; it makes no difference because the node is one
logical entity.