AudioCodes Media Pack MP-11x, Руководство пользователя

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User's Manual 256 Document #: LTRT-65432
MP-11x & MP-124
23.2 Configuring Tel to IP Routing
The Tel to IP Routing page allows you to configure up to 50 Tel-to-IP call routing rules. The
device uses these rules to route calls from the Tel to a user-defined IP destination.
The Tel to IP Routing table provides two configuration areas:

Matching Characteristics: Characteristics of the incoming call. If the call
characteristics match a table entry, the routing rule is used to route the call to the
specified destination. One or more characteristics can be defined for the rule:
•
Source and destination Request-URI host name prefix
•
Source Hunt Group (from where the call is received)
•
Source (calling) and destination (called) telephone number prefix and suffix

Destination: If the call matches the configured characteristics, the device routes the
call to an IP destination. If no characteristics match is found in the table, the call is
rejected. The destination can be any of the following:
•
IP address in dotted-decimal notation.
•
Fully Qualified Domain Name (FQDN).
•
E.164 Telephone Number Mapping (ENUM service).
•
IP Group, where the call is routed to the IP address configured for the Proxy Set
associated with the IP Group (configured in 'Configuring IP Groups' on page
205 ).
Notes: When using a proxy server, you do not need to configure this table, unless
you require one of the following:
•
Fallback (alternative) routing if communication is lost with the proxy server.
•
IP security, whereby the device routes only received calls whose source IP
addresses are defined in this table. IP security is enabled using the
SecureCallsFromIP parameter.
•
Filter Calls to IP feature: the device checks this table before a call is routed to the
proxy server. However, if the number is not allowed, i.e., the number does not
exist in the table or a Call Restriction (see below) routing rule is applied, the call is
released.
•
Obtain different SIP URI host names (per called number).
•
Assign IP Profiles to calls.
•
For this table to take precedence over a proxy for routing calls, you need to set the
parameter PreferRouteTable to 1. The device checks the 'Destination IP Address'
field in this table for a match with the outgoing call; a proxy is used only if a match
is not found.
In addition to basic outbound IP routing, this table supports the following features:

Least Cost Routing (LCR): If the LCR feature is enabled, the device searches the
routing table for matching routing rules and then selects the one with the lowest call
cost. The call cost of the routing rule is done by assigning it a Cost Group. For
configuring Cost Groups, see 'Least Cost Routing' on page
195 . If two routing rules
have identical costs, then the rule appearing higher up in the table (i.e., first-matched
rule) is used. If a selected route is unavailable, the device uses the next least-cost
routing rule. However, even if a matched rule is not assigned a Cost Group, the device
can select it as the preferred route over other matched routing rules with Cost Groups,
according to the settings of the LCR parameter, LCRDefaultCost (see 'Enabling LCR
and Configuring Default LCR' on page
197 ).