n
Mode
of
Alias pattern match
n
Pattern string
of
8(\d{4})
n
Pattern type
of
Regex
n
Pattern behavior
of
Replace
n
Replace string
of
44123123(\1)
With this configuration, it is the resulting string (
44123123xxxx
) that is converted into an ENUM domain
and queried for via DNS.
To verify you have configured your outward ENUM dialing correctly, use the
Locate tool
(
Maintenance >
Tools > Locate
) to try to resolve an E.164 alias.
ENUM dialing for incoming calls
For your locally registered endpoints to be reached using ENUM dialing, you must configure a DNS NAPTR
record that maps your endpoints’ E.164 numbers to their SIP/H.323 URIs. This record must be located at an
appropriate DNS domain where it can be found by any systems attempting to reach you by using ENUM
dialing.
About DNS domains for ENUM
ENUM relies on the presence of NAPTR records to provide the mapping between E.164 numbers and their
SIP/H.323 URIs.
RFC 3761
, which is part of a suite of documents that define the ENUM standard, specifies that the domain
for ENUM - where the NAPTR records should be located for public ENUM deployments - is
e164.arpa
.
However, use of this domain requires that your E.164 numbers are assigned by an appropriate national
regulatory body. Not all countries are yet participating in ENUM, so you may want to use an alternative
domain for your NAPTR records. This domain could reside within your corporate network (for internal use of
ENUM) or it could use a public ENUM database such as
http://www.e164.org
.
Configuring DNS NAPTR records
ENUM relies on the presence of NAPTR records, as defined by
RFC 2915
. These are used to obtain an
H.323 or SIP URI from an E.164 number.
The record format that the VCS supports is:
order flag preference service regex replacement
where:
n
order
and
preference
determine the order in which NAPTR records are processed. The record with the
lowest order is processed first, with those with the lowest preference being processed first in the case of
matching order.
n
flag
determines the interpretation of the other fields in this record. Only the value
u
(indicating that this is
a terminal rule) is currently supported, and this is mandatory.
n
service
states whether this record is intended to describe E.164 to URI conversion for H.323 or for SIP.
Its value must be either
E2U+h323
or
E2U+SIP
.
n
regex
is a regular expression that describes the conversion from the given E.164 number to an H.323 or
SIP URI.
n
replacement
is not currently used by the VCS and should be set to
.
(the full stop character).
Cisco VCS Administrator Guide (X8.1.1)
Page 215 of 507
Dial plan and call processing
About ENUM dialing
