Cisco Cisco TelePresence Video Communication Server Expressway 관리 매뉴얼
Dial plan and call processing
is because these endpoints would be located using the
, rather
than a DNS query.
If you want to use URI dialing from your network without the use of DNS, you would need to ensure
that all the systems in your network were connected to each other by neighbor relationships - either
directly or indirectly. This would ensure that any one system could locate an endpoint registered to
itself or any another system, by searching for the endpoint's URI.
that all the systems in your network were connected to each other by neighbor relationships - either
directly or indirectly. This would ensure that any one system could locate an endpoint registered to
itself or any another system, by searching for the endpoint's URI.
This does not scale well as the number of systems grows. It is also not particularly practical, as it
means that endpoints within your network will not be able to dial endpoints registered to systems
outside your network (for example when placing calls to another company) if there is not already a
neighbor relationship between the two systems.
means that endpoints within your network will not be able to dial endpoints registered to systems
outside your network (for example when placing calls to another company) if there is not already a
neighbor relationship between the two systems.
If a DNS zone and a DNS server have not been configured on the local Cisco VCS, calls to endpoints
that are not registered locally or to a neighbor system could still be placed if the local Cisco VCS is
neighbored (either directly or indirectly) with another Cisco VCS that has been configured for URI
dialing via DNS. In this case, any URI-dialed calls that are picked up by search rules that refer to that
neighbor zone will go via that neighbor, which will perform the DNS lookup.
that are not registered locally or to a neighbor system could still be placed if the local Cisco VCS is
neighbored (either directly or indirectly) with another Cisco VCS that has been configured for URI
dialing via DNS. In this case, any URI-dialed calls that are picked up by search rules that refer to that
neighbor zone will go via that neighbor, which will perform the DNS lookup.
This configuration is useful if you want all URI dialing to be made via one particular system, such as a
Cisco VCS Expressway.
Cisco VCS Expressway.
If you do not want to use DNS as part of URI dialing within your network, then no special configuration
is required. Endpoints will register with an alias in the form of a URI, and when calls are placed to that
URI the Cisco VCS will query its local zone and neighbors for that URI.
is required. Endpoints will register with an alias in the form of a URI, and when calls are placed to that
URI the Cisco VCS will query its local zone and neighbors for that URI.
If the Cisco VCS does not have DNS configured and your network includes H.323 endpoints, then in
order for these endpoints to be reachable using URI dialing either:
order for these endpoints to be reachable using URI dialing either:
n
the H.323 endpoints should register with the Cisco VCS using an address in the format of a URI
n
an appropriate transform should be written to convert URIs into the format used by the H.323
registrations. An example would be a deployment where H.323 endpoints register with an alias, and
incoming calls are made to alias@domain.com. A local transform is then configured to strip the
@domain, and the search is made locally for alias. See
registrations. An example would be a deployment where H.323 endpoints register with an alias, and
incoming calls are made to alias@domain.com. A local transform is then configured to strip the
@domain, and the search is made locally for alias. See
for an example of how to do this.
SIP endpoints always register with an AOR in the form of a URI, so no special configuration is
required.
required.
URI dialing via DNS
By using DNS as part of URI dialing, it is possible to find an endpoint even though it may be registered
to an unknown system. The Cisco VCS uses a DNS lookup to locate the domain in the URI address
and then queries that domain for the alias. See the
to an unknown system. The Cisco VCS uses a DNS lookup to locate the domain in the URI address
and then queries that domain for the alias. See the
section for more
information.
URI dialing via DNS is enabled separately for outgoing and incoming calls.
Outgoing calls
To enable your Cisco VCS to locate endpoints using URI dialing via DNS, you must:
n
configure at least one DNS zone and an associated search rule
n
configure at least one DNS server
This is described in the
section.
Incoming calls
To enable endpoints registered to your Cisco VCS to receive calls from non-locally registered
endpoints using URI dialing via DNS, you must:
endpoints using URI dialing via DNS, you must:
Cisco VCS Administrator Guide (X6)
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