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User's Manual

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Document #: LTRT-10375

Mediant 500 MSBR

Parameter

Description

For IP Groups, the status indicates the connectivity with the SIP proxy
server's address configured for the Proxy Set that is associated with the IP
Group. For the status to be displayed, the Proxy Keep-Alive feature, which
monitors the connectivity with proxy servers per Proxy Set, must be enabled
for the Proxy Set (see Configuring Proxy Sets on page 348). If a Proxy Set is
configured with multiple proxies for redundancy, the status may change
according to the proxy server with which the device attempts to verify
connectivity. For example, if there is no response from the first configured
proxy address, the status displays "No Connectivity". However, if there is a
response from the next proxy server in the list, the status changes to "OK".

If there is connectivity with the destination, the field displays "OK" and the
device uses the routing rule if required. The routing rule is not used if any of
the following is displayed:



"n/a" = IP Group is unavailable.



"No Connectivity" = No connection with the destination (no response to
the SIP OPTIONS).



"QoS Low" = Poor Quality of Service (QoS) of the destination.



"DNS Error" = No DNS resolution. This status is applicable only when a
domain name is used (instead of an IP address).



"Not Available" = Destination is unreachable due to networking issues.

27.2 Configuring IP-to-Tel Routing Rules

The IP-to-Tel Routing table lets you configure up to 120 IP-to-Tel routing rules. IP-to-Tel
routing rules 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 configured per Trunk Group
(see Configuring Trunk Group Settings on page 487) or for all Trunk Groups, using the
global parameter ChannelSelectMode.

Configuration of IP-to-Tel routing rules includes two areas:



Match:

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.

If an IP-to-Tel call cannot be routed to the Trunk Group, the device can route it to an
alternative destination:



Routing to an Alternative Trunk Group:

If the device sends the IP call to the Tel

destination and a subsequent call release reason (cause) code (e.g., 17 for User
Busy) is received from the Tel side, and you have configured this release reason code
in the Reasons for IP-to-Tel Alternative Routing table, the device re-routes the call to
an alternative Trunk Group if an alternative routing rule has been configured in the
table. The alternative routing rules must be configured in table rows (indices) that are
located anywhere below the "main" routing rule. For example, if you configure a "main"
routing rule in Index 4, the alternative routing rule can be configured in Index 6. In
addition, you must configure the alternative routing rules with identical matching
characteristics (e.g., destination prefix number) to the "main" routing rule, but assigned
with different destinations (i.e., Trunk Groups). For more information on IP-to-Tel
alternative routing and for configuring call release reasons for alternative routing, see

AudioCodes Mediant 500 MSBR, User Manual

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