AudioCodes Mediant 500 E-SBC, User Manual

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User's Manual 394 Document #: LTRT-10437
Mediant 500 E-SBC
Parameter Description
entry 2 with Forking Group "3", index entry 3 with Forking
Group "2", and index entry 4 with Forking Group "1": The
device first sends the call according to index entries 1 and 4 (all
belonging to Forking Group "1"), and if the destination is
unavailable and alternative routing is enabled, the device sends
the call according to index entry 2 (Forking Group "3"). Even if
index entry 2 is unavailable and alternative routing is enabled,
the device ignores index entry 3 because it belongs to a
Forking Group that is lower than index entry 2.
Notes:

To enable Tel-to-IP call forking, set the 'Tel2IP Call Forking
Mode' (
Tel2IPCallForkingMode ) parameter to Enable .

You can configure the device to immediately send the INVITE
message to the first member of the Forking Group (as in
normal operation) and then only after a user-defined interval,
send (simultaneously) the INVITE messages to the other
members. If the device receives a SIP 4xx or 5xx in response
to the first INVITE, it immediately sends INVITEs to all the other
members, regardless of the interval. To configure this feature,
use the ForkingDelayTimeForInvite ini file parameter.

You can implement Forking Groups when the destination is an
LDAP server or a domain name using DNS. In such scenarios,
the INVITE is sent to all the queried LDAP or resolved IP
addresses, respectively. You can also use LDAP routing rules
with standard routing rules for Forking Groups.

When the UseDifferentRTPportAfterHold parameter is enabled,
every forked call is sent with a different RTP port. Thus, ensure
that the device has sufficient available RTP ports for these
forked calls.
24.3 Configuring Inbound IP Routing Table
The Inbound IP Routing table lets you configure up to 120 inbound call routing rules:

For IP-to-IP routing: The table is used to identify an incoming call as an IP-to-IP call
and subsequently, to assign the call to an IP Group, referred to as a source IP Group.
These IP-to-IP calls can later be routed to an outbound destination IP Group (see
Configuring Outbound IP Routing Table on page
385 ).

For IP-to-Tel routing: This table is used to route incoming IP calls to Trunk Groups.
The specific channel pertaining to the Trunk Group to which the call is routed is
determined according to the Trunk Group's channel selection mode. The channel
selection mode can be defined per Trunk Group (see ''Configuring Hunt Group
Settings'' on page
355 ) or for all Trunk Groups using the global parameter
ChannelSelectMode.
Configuration of Inbound IP Routing routing rules includes two areas:

Rule: Defines the characteristics of the incoming IP call (e.g., IP Group from which the
call is received).

Action: Defines the action that is done if the incoming call matches the characteristics
of the rule (i.e., routes the call to the specified Tel/Trunk Group 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 Tel
destination configured for that rule. If it doesn't find a matching rule, it rejects the call.