SIP User's Manual 138 Document #: LTRT-65415
MediaPack Series
3.3.2.8.3.2 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 IP destinations.
This table provides two main areas for defining a routing rule:
Matching Characteristics: User-defined 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 such as
Hunt Group (from where the call is received), source (calling)/destination (called)
telephone number prefix.
Destination: User-defined IP destination. If the call matches the characteristics, the
device routes the call to this destination. If the number dialed does not match the
characteristics, the call is not made. The destination can be any of the following:
• IP address
• Fully Qualified Domain Name (FQDN)
• E.164 Number Mapping (ENUM)
• Lightweight Directory Access Protocol (LDAP) - for a description, see Routing
Based on LDAP Active Directory Queries
• IP Group - the call is routed to the Proxy Set (IP address) associated with the IP
Group (defined in ''Configuring IP Groups'' on page 103)
Whe
n using a proxy server, you don't need to configure this table unless you require one of
the following:
Fallback routing if communication is lost with the proxy server.
IP Security feature (enabled using the SecureCallFromIP parameter): the device
routes only received calls whose source IP address is defined in this table.
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.
Note: 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.
Possible uses for configuring routing rules in this table (in addition to those listed above
when using a proxy), include the following:
Call Restriction: Rejects calls whose routing rule is associated with the destination IP
address 0.0.0.0.
Always Use Routing Table feature: Even if a proxy server is used, the SIP Request-
URI host name in the sent INVITE message is obtained from this table. Using this
feature, you can assign a different SIP URI host name for different called and/or
calling numbers. This feature is enabled using the AlwaysUseRouteTable parameter.
Assign IP Profiles: IP Profiles can be assigned to destination addresses (also when
a proxy is used).
Alternative Routing (when a proxy isn't used): An alternative IP destination can be
configured for specific calls. To associate an alternative IP address to a called
telephone number prefix, assign it with an additional entry (with a different IP
address), or use an FQDN that resolves into two IP addresses. The call is sent to the
alternative destination when one of the following occurs:
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