Configuring Dial Plan Settings; About The Fallback Alias - Cisco TelePresence Administrator's Manual

Dial plan and call processing

Configuring dial plan settings

The Dial plan configuration
the VCS routes calls in specific call scenarios.
The configurable options are:
Field Description
Calls to Determines the way in which the VCS attempts to call
unknown IP systems which are not registered with it or one of its
addresses 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.
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.
Off: endpoints registered directly to the VCS may only call an
IP address of a system also registered directly to that VCS.
The default is Indirect.
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.

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:
the caller has dialed the IP address of the VCS directly
n
the caller has dialed a domain name belonging to the VCS (either one of its configured SIP domains, or any
n
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.
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.
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.
Cisco VCS Administrator Guide (X8.1.1)
page (Configuration > Dial plan >
Configuring dial plan settings
Configuration) is used to configure how
Usage tips
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.
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.
See Dialing by IP address
[p.201] for more information.
If no fallback alias is configured,
calls that do not specify an alias
will be disconnected. See
below for more information.
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