Cisco Cisco Expressway 维护手册
4.
Click Save.
The Expressway should connect to the policy service server and start using the service for Call Policy
decisions.
decisions.
Any connection problems will be reported on this page. Check the Status area at the bottom of the page and
check for additional information messages against the Server address fields.
check for additional information messages against the Server address fields.
Supported Address Formats
The destination address that is entered using the caller’s endpoint can take a number of different formats, and this
affects the specific process that the Expressway follows when attempting to locate the destination endpoint. The
address formats supported by the Expressway are:
affects the specific process that the Expressway follows when attempting to locate the destination endpoint. The
address formats supported by the Expressway are:
■
IP address, for example
10.44.10.1
or
3ffe:80ee:3706::10:35
■
H.323 ID, for example
john.smith
or
john.smith@example.com
(note that an H.323 ID can be in the form of a URI)
■
E.164 alias, for example
441189876432
or
6432
■
URI, for example
john.smith@example.com
■
ENUM, for example
441189876432
or
6432
Each of these address formats may require some configuration of the Expressway in order for them to be supported.
These configuration requirements are described below.
These configuration requirements are described below.
Dialing by IP Address
Dialing by IP address is necessary when the destination endpoint is not registered with any system. See the
Dialing by H.323 ID or E.164 Alias
No special configuration is required to place a call using an H.323 ID or E.164 alias.
, applying any transforms and then searching the external
zones for the alias, according to the search rules.
Note that SIP endpoints always register using an AOR in the form of a URI. You are recommended to ensure that
H.323 endpoints also register with an H.323 ID in the form of a URI to facilitate interworking.
H.323 endpoints also register with an H.323 ID in the form of a URI to facilitate interworking.
Dialing by H.323 or SIP URI
When a user places a call using URI dialing, they will typically dial
name@example.com
.
If the destination endpoint is registered to a neighbor system, no special configuration is required for the call to be
placed. The Expressway follows the usual
placed. The Expressway follows the usual
, applying any transforms and then searching the external
zones for the alias, according to the search rules.
URI dialing may make use of DNS to locate the destination endpoint. To support URI dialing via DNS, you must
configure the Expressway with at least one DNS server and at least one DNS zone.
configure the Expressway with at least one DNS server and at least one DNS zone.
Full instructions on how to configure the Expressway to support URI dialing via DNS (both outbound and inbound) are
given in the URI dialing section.
given in the URI dialing section.
Dialing by ENUM
ENUM dialing allows an endpoint to be contacted by a caller dialing an E.164 number - a telephone number - even if
that endpoint has registered using a different format of alias. The E.164 number is converted into a URI by the DNS
system, and the rules for URI dialing are then followed to place the call.
that endpoint has registered using a different format of alias. The E.164 number is converted into a URI by the DNS
system, and the rules for URI dialing are then followed to place the call.
The ENUM dialing facility allows you to retain the flexibility of URI dialing while having the simplicity of being called
using just a number - particularly important if any of your callers are restricted to dialing using a numeric keypad.
using just a number - particularly important if any of your callers are restricted to dialing using a numeric keypad.
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Cisco Expressway Administrator Guide