Cisco Cisco Expressway Maintenance Manual
■
regex
is a regular expression that describes the conversion from the given E.164 number to an H.323 or SIP
URI.
■
replacement
is not currently used by the Expressway and should be set to
.
(the full stop character).
Non-terminal rules in ENUM are not currently supported by the Expressway. For more information on these, see
section 2.4.1 of
section 2.4.1 of
.
For example, the record:
IN NAPTR 10 100 "u" "E2U+h323" "!^(.*)$!h323:\1@example.com!" .
would be interpreted as follows:
■
10
is the
order
■
100
is the
preference
■
u
is the
flag
■
E2U+h323
states that this record is for an H.323 URI
■
!^(.*)$!h323:\1@example.com!
describes the conversion:
—
!
is a field separator
—
the first field represents the string to be converted. In this example,
^(.*)$
represents the entire E.164
number
—
the second field represents the H.323 URI that will be generated. In this example,
h323:\1@example.com
states that the E.164 number will be concatenated with
@example.com
. For example,
1234
will be mapped to
1234@example.com
.
■
.
shows that the replacement field has not been used.
Configuring DNS Servers for ENUM and URI Dialing
DNS servers are required to support ENUM and URI dialing:
■
ENUM dialing: to query for NAPTR records that map E.164 numbers to URIs
■
URI dialing: to look up endpoints that cannot be accessed via neighbor systems
To configure the DNS servers used by the Expressway for DNS queries:
1.
Go to the DNS page (System > DNS).
2.
Enter in the Address 1 to Address 5 fields the IP addresses of up to 5 DNS servers that the Expressway will
query when attempting to locate a domain. These fields must use an IP address, not a FQDN.
query when attempting to locate a domain. These fields must use an IP address, not a FQDN.
Configuring Call Routing and Signaling
The Call routing page (Configuration > Call routing) is used to configure the Expressway's call routing and signaling
functionality.
functionality.
Call Signaling Optimization
, the Expressway always handles both
the media and the signaling. For non-traversal calls, the Expressway does not handle the media, and may or may not
need to handle the signaling.
need to handle the signaling.
The Call signaling optimization setting specifies whether the Expressway removes itself, where it can, from the call
signaling path after the call has been set up. The options for this setting are:
signaling path after the call has been set up. The options for this setting are:
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Cisco Expressway Administrator Guide