Cisco Cisco TelePresence Video Communication Server Expressway 관리 매뉴얼
112
D14049.08
November 2010
November 2010
Grey Headline (continued)
CISCO TELEPRESENCE
VIDEO COMMUNICATION SERVER
ADMINISTRATOR GUIDE
ENUM dialing
ENUM dialing for outgoing calls
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
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:
To create a new ENUM zone using the CLI:
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.
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.
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.
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.
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:
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)
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:
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
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
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
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
any other zones (see the
section for full information).
Any ENUM zone transforms are applied before the number is
converted to an ENUM domain.
converted to an ENUM domain.
Example
For example, you want to enable ENUM dialing from your network
to endpoints at a remote site using a prefix of
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:
configure an ENUM zone on your VCS and then an associated
search rule with:
•
Mode of Alias Pattern Match
•
Pattern string of
8(\d{4})
•
Pattern type of Regex
•
Pattern behavior of Replace
•
Replace string of
44123123(\1)
With this configuration, it will be the resulting string (i.e.
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.
correctly, use the Locate tool (Maintenance > Tools >
Locate) to try to resolve an E.164 alias.
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:
searching for NAPTR records:
•
System configuration > DNS.
You are taken to the DNS page.
You are taken to the DNS page.
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.
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.
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.
query when attempting to locate a domain.