AudioCodes Mediant 2000, Руководство пользователя

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Version 5.6 175 November 2008
SIP User's Manual 3. Web-Based Management
Parameter Description
Max Allowed Delay for Alt Routing
[msec]
[IPConnQoSMaxAllowedDelay]
Transmission delay (in msec) at which the IP connection is
considered a failure and Alternative Routing mechanism is
activated.
The range is 100 to 1000. The default value is 250.
3.4.7.4.2 Tel to IP Routing Table
The 'Tel to IP Routing' page provides a table for configuring up to up to 50 routing rules for
Tel-to-IP calls, where Tel calls are routed to destinations based on IP address (or IP
Group).
Note:
The 'Tel to IP Routing' page appears only if the parameter EnableSBC is set
to 0 (default) in ''SBC Configuration'' on page 163 . If this parameter is
enabled, the 'Outbound IP Routing Table' page appears instead (refer to
''Outbound IP Routing Table'' on page
178 for a description of this page).
This routing table associates called and/or calling telephone number prefixes (originating
from a specific Trunk Group), with a destination IP address (or Fully Qualified Domain
Name - FQDN) or IP Group. When a call is routed by the device (i.e., a Proxy server isn't
used), the called and calling numbers are compared to the list of prefixes in this table. Calls
that match these prefixes are sent to the corresponding IP address. If the number dialed
does not match these prefixes, the call is not made.
When using a Proxy server, you do not need to configure this table unless you require one
of the following:
„ Fallback routing when communication with Proxy servers is lost.
„ Implement the 'Filter Calls to IP' and 'IP Security' features.
„ Obtain different SIP URI host names (per called number).
„ Assign IP profiles.
Note that for this table to take precedence over a Proxy for routing calls, 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 Tel-to-IP routing include the following:
„ Fallback to internal routing table if there is no communication with the Proxy servers.
„ Call Restriction (when Proxy isn't used): rejects all outgoing Tel-to-IP calls that are
associated with the destination IP address 0.0.0.0.
„ IP Security: When the IP Security feature is enabled (SecureCallFromIP = 1), the
device accepts only those IP-to-Tel calls with a source IP address defined in the 'Tel to
IP Routing' table.
„
Filter Calls to IP: When a Proxy is used, the device checks the 'Tel to IP Routing' table
before a telephone number is routed to the Proxy. If the number is not allowed
(number isn't listed or a Call Restriction routing rule is applied), the call is released.
„ Always Use Routing Table: When this feature is enabled (AlwaysUseRouteTable = 1),
even if a Proxy server is used, the SIP 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.