Cisco TelePresence Administrator's Manual page 208

Field Guidelines
Hop count The hop count
other zone types. The currently applicable hop count is maintained when the VCS initiates a
new search process for the alias returned by the DNS lookup.
DNS suffix The suffix to append to a transformed E.164 number to create an ENUM host name. It
represents the DNS zone (in the domain name space) to be queried for a 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.
5. Click Create zone.
Note that:
Any number of ENUM zones may be configured on the VCS. You should configure at least one ENUM
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zone for each DNS suffix that your endpoints may use.
Normal search rule pattern matching and prioritization rules apply to ENUM zones.
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You must also configure the VCS with details of DNS servers
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records.
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)
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a related search rule with a Mode of Any alias
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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
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use the Pattern string and Pattern type fields to define the aliases for each domain that will trigger an
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ENUM lookup
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
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Pattern string of 44
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Pattern type of Prefix
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This results in an ENUM query being sent to that zone only when someone dials a number starting with 44.
Configuring transforms for ENUM zones
Cisco VCS Administrator Guide (X7.2)
specified for an ENUM zone is applied in the same manner as hop counts for
Dial plan and call processing
to be used when searching for NAPTR
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