Cisco Cisco Expressway Maintenance Manual
Configuring dial plan settings
The
Dial plan configuration
page (
Configuration > Dial plan > Configuration
) is used to configure how
the Expressway routes calls in specific call scenarios.
The configurable options are:
Field
Description
Usage tips
Calls to
unknown IP
addresses
unknown IP
addresses
Determines the way in which the Expressway attempts to call
systems which are not registered with one of its neighbors.
systems which are not registered with one of its neighbors.
Direct: allows an endpoint to make a call to an unknown IP
address without the Expressway querying any neighbors.
address without the Expressway querying any neighbors.
Indirect: upon receiving a call to an unknown IP address, the
Expressway queries its neighbors for the remote address
and if permitted routes the call through the neighbor.
Expressway queries its neighbors for the remote address
and if permitted routes the call through the neighbor.
Off: calls to unknown IP addresses are not allowed.
The default is Indirect.
This setting applies to the call's
destination address prior to any
zone transforms, but after any
pre-search transforms or Call
Policy rules have been applied.
destination address prior to any
zone transforms, but after any
pre-search transforms or Call
Policy rules have been applied.
Fallback alias
The alias to which incoming calls are placed for calls where
the IP address or domain name of the Expressway has been
given but no callee alias has been specified.
the IP address or domain name of the Expressway 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 Expressway 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:
for one of the following reasons:
n
the caller has dialed the IP address of the Expressway directly
n
the caller has dialed a domain name belonging to the Expressway (either one of its configured SIP
domains, or any domain that has an SRV record that points at the IP address of the Expressway), without
giving an alias as a prefix
domains, or any domain that has an SRV record that points at the IP address of the Expressway), 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.
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.
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
reception@example.com
. They configure their Expressway 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.
answer the call and direct it appropriately.
Cisco Expressway Administrator Guide (X8.1.1)
Page 110 of 343
Dial plan and call processing
Configuring dial plan settings