Cisco Cisco TelePresence Video Communication Server Expressway 관리 매뉴얼
Field
Description
Usage tips
Calls to
unknown IP
addresses
unknown IP
addresses
Determines the way in which the VCS attempts to call systems
which are not registered with it or one of its neighbors.
which are not registered with it or one of its neighbors.
Direct: allows an endpoint to make a call to an unknown IP
address without the VCS querying any neighbors. The call
setup would occur just as it would if the far end were
registered directly to the local system.
address without the VCS querying any neighbors. The call
setup would occur just as it would if the far end were
registered directly to the local system.
Indirect: upon receiving a call to an unknown IP address, the
VCS will query its neighbors for the remote address and if
permitted will route the call through the neighbor.
VCS will query its neighbors for the remote address and if
permitted will route the call through the neighbor.
Off: endpoints registered directly to the VCS may only call an
IP address of a system also registered directly to that VCS.
IP address of a system also registered directly to that VCS.
The default is Indirect.
This setting applies to the call's
destination address prior to any
zone transforms, but after any
pre-search transforms, Call
Policy or User Policy rules have
been applied.
destination address prior to any
zone transforms, but after any
pre-search transforms, Call
Policy or User Policy rules have
been applied.
In addition to controlling calls,
this setting also determines the
behavior of provisioning and
presence messages to SIP
devices, as these messages are
routed to IP addresses.
this setting also determines the
behavior of provisioning and
presence messages to SIP
devices, as these messages are
routed to IP addresses.
Fallback alias
The alias to which incoming calls are placed for calls where
the IP address or domain name of the VCS has been given but
no callee alias has been specified.
the IP address or domain name of the VCS has been given but
no callee alias has been specified.
If no fallback alias is configured,
calls that do not specify an alias
will be disconnected. See below
for more information.
calls that do not specify an alias
will be disconnected. See below
for more information.
About the Fallback Alias
The VCS could receive a call that is destined for it but which does not specify an alias. This could be for one of the
following reasons:
following reasons:
■
the caller has dialed the IP address of the VCS directly
■
the caller has dialed a domain name belonging to the VCS (either one of its configured SIP domains, or any
domain that has an SRV record that points at the IP address of the VCS), without giving an alias as a prefix
domain that has an SRV record that points at the IP address of the VCS), without giving an alias as a prefix
Normally such calls would be disconnected. However, such calls will be routed to the Fallback alias if it is specified.
Note that some endpoints do not allow users to enter an alias and an IP address to which the call should be placed.
Note that some endpoints do not allow users to enter an alias and an IP address to which the call should be placed.
Example usage
You may want to configure your fallback alias to be that of your receptionist, so that all calls that do not specify an
alias are still answered personally and can then be redirected appropriately.
alias are still answered personally and can then be redirected appropriately.
For example, Example Inc has the domain of
example.com
. The endpoint at reception has the alias
reception@example.com
. They configure their VCS with a fallback alias of
reception@example.com
. This means that any
calls made directly to
example.com
(that is, without being prefixed by an alias), are forwarded to
reception@example.com
, where the receptionist can answer the call and direct it appropriately.
About Transforms and Search Rules
The VCS can be configured to use transforms and search rules as a part of its call routing process.
Transforms
Transforms are used to modify the alias in a search request if it matches certain criteria. You can transform an alias
by removing or replacing its prefix, suffix, or the entire string, and by the use of regular expressions.
by removing or replacing its prefix, suffix, or the entire string, and by the use of regular expressions.
This transformation can be applied to the alias at two points in the routing process: as a pre-search transform, and as
a zone transform.
a zone transform.
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Cisco TelePresence Video Communication Server Administrator Guide
Dial Plan and Call Processing