Cisco Cisco Expressway Manuale Di Manutenzione
Field
Guidelines
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.
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:
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Any number of ENUM zones may be configured on the Expressway. You should configure at least one
ENUM zone for each DNS suffix that your endpoints may use.
ENUM zone for each DNS suffix that your endpoints may use.
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Normal search rule pattern matching and prioritization rules apply to ENUM zones.
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NAPTR records.
Configuring search rules for ENUM zones
If you want to be able to make ENUM calls via the Expressway, then at a minimum you should configure an
ENUM zone and a related search rule with:
ENUM zone and a related search rule with:
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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
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.
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:
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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
ENUM lookup
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 Expressway, and then
an associated search rule with:
endpoints’ E.164 numbers start with 44. You would configure an ENUM zone on your Expressway, and then
an associated search rule with:
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Mode of Alias pattern match
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Pattern string of 44
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Pattern type of Prefix
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
Any ENUM zone transforms are applied before the number is converted to an ENUM domain.
Cisco Expressway Administrator Guide (X8.5.2)
Page 173 of 403
Dial plan and call processing
About ENUM dialing