Cisco Cisco TelePresence Video Communication Server Expressway 관리 매뉴얼
Structuring your Dial Plan
As you start deploying more than one VCS, it is useful to neighbor the systems together so that they can query each
other about their registered endpoints. Before you start, you should consider how you will structure your dial plan.
This will determine the aliases assigned to the endpoints, and the way in which the VCSs are neighbored together.
The solution you choose will depend on the complexity of your system. Some possible options are described in the
following sections.
other about their registered endpoints. Before you start, you should consider how you will structure your dial plan.
This will determine the aliases assigned to the endpoints, and the way in which the VCSs are neighbored together.
The solution you choose will depend on the complexity of your system. Some possible options are described in the
following sections.
Flat Dial Plan
The simplest approach is to assign each endpoint a unique alias and divide the endpoint registrations between the
VCSs. Each VCS is then configured with all the other VCS as neighbor zones. When one VCS receives a call for an
endpoint which is not registered with it, it will send out a Location Request to all the other neighbor VCSs.
VCSs. Each VCS is then configured with all the other VCS as neighbor zones. When one VCS receives a call for an
endpoint which is not registered with it, it will send out a Location Request to all the other neighbor VCSs.
While conceptually simple, this sort of flat dial plan does not scale very well. Adding or moving a VCS requires
changing the configuration of every VCS, and one call attempt can result in a large number of location requests. This
option is therefore most suitable for a deployment with just one or two VCSs plus its peers.
changing the configuration of every VCS, and one call attempt can result in a large number of location requests. This
option is therefore most suitable for a deployment with just one or two VCSs plus its peers.
Structured Dial Plan
An alternative deployment would use a structured dial plan where endpoints are assigned an alias based on the
system they are registering with.
system they are registering with.
If you are using E.164 aliases, each VCS would be assigned an area code. When the VCSs are neighbored together,
each neighbor zone would have an associated search rule configured with its corresponding area code as a prefix (a
Mode of Alias pattern match and a Pattern type of Prefix). That neighbor would then only be queried for calls to
numbers which begin with its prefix.
each neighbor zone would have an associated search rule configured with its corresponding area code as a prefix (a
Mode of Alias pattern match and a Pattern type of Prefix). That neighbor would then only be queried for calls to
numbers which begin with its prefix.
In a URI based dial plan, similar behavior may be obtained by configuring search rules for each neighbor with a suffix
to match the desired domain name.
to match the desired domain name.
It may be desirable to have endpoints register with just the subscriber number — the last part of the E.164 number. In
that case, the search rule could be configured to strip prefixes before sending the query to that zone.
that case, the search rule could be configured to strip prefixes before sending the query to that zone.
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Cisco TelePresence Video Communication Server Administrator Guide