AudioCodes Mediant 3000 User Manual page 364

selection mode can be defined per Trunk Group (see 'Configuring Trunk Group
Settings' on page 327) or for all Trunk Groups using the global parameter
ChannelSelectMode.
Configuration of IP-to-Tel/IP-to-IP routing rules includes two areas:

Matching Characteristics: Defines the characteristics of the incoming IP call (e.g., IP
Group from which the call is received).

Destination: Defines the action that is done if the incoming call matches the
characteristics of the rule (i.e., routes the call to the specified destination).
The device searches the table from top to bottom for the first rule that matches the
characteristics of the incoming call. If it finds a matching rule, it sends the call to the
destination configured for that rule. If it doesn't find a matching rule, it rejects the call.
The device also supports alternative routing if the Trunk Group is unavailable:

If a call release reason is received for a specific IP-to-Tel call and this reason is
configured for alternative IP-to-Tel routing, then the device re-routes the call to an
alternative Trunk Group. The alternative route is configured in this table as an
additional row (below the main routing rule) with the same call characteristics, but with
a destination to a different Trunk Group. For more information on IP-to-Tel alternative
routing, see 'Alternative Routing to Trunk upon Q.931 Call Release Cause Code' on
page 372.

The device can re-route (i.e., call redirection) IP-to-Tel calls to an alternative IP
destination using SIP 3xx responses. For more information, see 'Alternative Routing to
IP Destinations upon Busy Trunk' on page 373.
The device automatically re-routes an IP-to-Tel call to a different physical physical trunk if
the initially destined physical trunk within the same Trunk Group is detected as out of
service (e.g., physically disconnected). When the physical physical trunk is disconnected,
the device sends the SNMP trap, GWAPP_TRAP_BUSYOUT_LINK notifying of the out-of-
service state for the specific trunk number. When the physical trunk is physically
reconnected, this trap is sent notifying of the back-to-service state.
Note:

To configure IP-to-Tel or inbound IP routing rules:
1. Open the Inbound IP Routing Table page (Configuration tab > VoIP menu > GW and
IP to IP submenu > Routing > IP to Trunk Group Routing).
The previous figure displays the following configured routing rules:
•
Rule 1: If the incoming IP call destination phone prefix is between 10 and 19, the
call is assigned settings configured for IP Profile ID 2 and routed to Trunk Group
ID 1.
User's Manual
You can also configure the Inbound IP Routing Table using the table ini file
parameter, PSTNPrefix (see 'Number Manipulation Parameters' on page
822).
Figure 24-4: Inbound IP Routing Table
364
Mediant 3000
Document #: LTRT-89729