AudioCodes Mediant 800B User Manual page 463

User's Manual
type, and/or SRD). Routing to a host name can be resolved using NAPTR/SRV/A-
Record.

Request-URI of incoming SIP dialog initiating requests.

ENUM query.

Hunt Group - used for call survivability (see 'Call Survivability for Call Centers' on page
446).

IP address (in dotted-decimal notation or FQDN - NAPTR/SRV/A-Record resolutions)
according to a specified Dial Plan index listed in the loaded Dial Plan file.

LDAP server or LDAP query result. For more information on LDAP-based routing, see
'Routing Based on LDAP Active Directory Queries' on page 181.
For all destination types listed above except destination IP Group, the IP Group can
optionally be itself, configured to provide the destination SRD and/or IP Profile. If neither
destination SRD nor destination IP Group is defined, the destination SRD is the source
SRD and the destination IP Group is its default IP Group.
The IP-to-IP Routing table also provides the following features:

Alternative routing or load balancing: In addition to the alternative routing/load
balancing provided by the Proxy Set associated with the destination IP Group, the
table allows the configuration of alternative routes whereby if a route fails, the next
adjacent (below) rule in the table that is configured as 'Alt Route Ignore/Consider
Inputs' are used. The alternative routes rules can be set to enforce the input matching
criteria or to ignore any matching criteria. Alternative routing occurs upon one of the
following conditions:

A request sent by the device is responded with one of the following:



The DNS resolution includes IP addresses that the device has yet to try (for the
current call).
Messages are re-routed with the same SIP Call-ID and CSeq header fields (increased
by 1).
Version 6.6
Figure ‎ 2 8-8: IP-to-IP Routing Types
SIP response code (i.e., 4xx, 5xx, and 6xx SIP responses) configured in the
SBC Alternative Routing Reasons table (see 'Configuring Alternative Routing
Reasons' on page 469).
SIP 408 Timeout or no response (after timeout).
463
‎ 2 8. SBC Configuration
Mediant 800B GW & E-SBC