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ENUM dialing
Adding and configuring ENUM zones
For locally registered endpoints to use ENUM dialing, you must
configure an ENUM zone for each ENUM service used by remote
endpoints. To do this:
1. Go to the Zones page (VCS configuration > Zones.)
2. Click New. You are taken to the Create zone page.
3. Enter a Name for the zone and select a Type of ENUM.
4. Configure the ENUM zone settings as described in the
following sections.
5. Click Create zone.
To create a new ENUM zone using the CLI:
xCommand ZoneAdd
•
xConfiguration Zones Zone [1..1000]
•
Any number of ENUM zones may be configured on the
VCS. You should configure at least one ENUM zone for
each DNS suffix that your endpoints may use.
Normal search rule pattern matching and prioritization
rules apply to ENUM zones.
Hop count
When placing a call dialed using ENUM, the actual hop count
used for the call is the hop count of the zone via which the call is
eventually placed after the alias has been resolved.
DNS suffix
The DNS zone that is to be queried for a NAPTR record. This suffix
is appended to the transformed E.164 number in an attempt to
find a matching NAPTR record.
H.323 mode
Controls if H.323 records are looked up for this zone.
SIP mode
Controls if SIP records are looked up for this zone.
Overview and
System
Introduction
status
configuration
D14049.07
March 2010
ENUM dialing for outgoing calls
Configuring matches for ENUM zones
If you want locally registered endpoints to be able to make ENUM
calls via the VCS, then at a minimum you should configure an
ENUM zone and a related search rule with:
•
a DNS suffix of e164.arpa (the domain specified by the ENUM
standard)
•
a related search rule with a Mode of Any Alias
This results in DNS always being queried for all types of aliases,
not just ENUMs. It also means that ENUM dialing will only be
successful if the enterprise being dialed uses the e164.arpa
domain. To ensure successful ENUM dialing, you must configure
an ENUM zone for each domain that holds NAPTR records for
endpoints that callers in your enterprise might want to dial.
You can then set up search rules that filter the queries sent to
each ENUM zone as follows:
•
use a Mode of Alias Pattern Match
•
use the Pattern string and Pattern type fields to define the
aliases for each domain that will trigger an ENUM lookup
Example
For example, you want to enable ENUM dialing from your network
to a remote office in the UK where the endpoints' E.164 numbers
start with 44. You would configure an ENUM zone on your VCS,
and then an associated search rule with:
•
Mode of Alias Pattern Match
Pattern string of 44
•
•
Pattern type of Prefix
This will result in an ENUM query being sent to that zone only
when someone dials a number starting with 44.
Configuring transforms for ENUM zones
You can configure transforms for ENUM zones in the same way as
any other zones (see the
Configuring search and zone transform
rules
section for full information).
Any ENUM zone transforms are applied before the number is
converted to an ENUM domain.
VCS
Zones and
Clustering and
configuration
neighbors
peers
Example
For example, you want to enable ENUM dialing from your network
to endpoints at a remote site using a prefix of 8 followed by the
last 4 digits of the remote endpoints' E.164 number. You would
configure an ENUM zone on your VCS and then an associated
search rule with:
•
•
•
•
•
With this configuration, it will be the resulting string (i.e.
44123123xxxx) that is converted into an ENUM domain and
queried for via DNS.
This can also be done using the CLI using
Configuring DNS servers
To configure the VCS with details of DNS servers to be used when
searching for NAPTR records:
•
•
Address 1 to Address 5
Enter the IP addresses of up to 5 DNS servers that the VCS will
query when attempting to locate a domain.
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Mode of Alias Pattern Match
Pattern string of 8(\d{4})
Pattern type of Regex
Pattern behavior of Replace
Replace string of 44123123(\1)
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.
xCommand
System configuration > DNS.
You are taken to the DNS page.
xConfiguration IP DNS Server
For endpoints registered to the VCS to make outgoing
calls using ENUM dialing, you must configure at least one
DNS server for the VCS to query. For resilience, you can
specify up to five DNS servers.
The DNS servers configured using this page are used as
part of both the ENUM dialing and URI dialing via DNS
processes.
Firewall
Applications
Maintenance
traversal
ADMINISTRATOR GUIDE
Locate.
Appendices
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