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V7122 Gateway User Guide
83
Table 23
Phone-Context Parameters
Parameter Description
NPI
Select the Number Plan assigned to this entry.
You can select the following:
0 = Unknown (default)
1 = E.164 Public
9 = Private
For a detailed list of the available NPI/TON values, see
Numbering Plans and
Type of Number
.
TON
Select the Number Type assigned to this entry.
If you selected Unknown as the NPI, you can select Unknown (0)
If you selected Private as the NPI, you can select Unknown (0), Level 2 Regional
(1), Level 1 Regional (2), PSTN Specific (3), or Level 0 Regional (Local) (4).
If you selected E.164 Public as the NPI, you can select Unknown (0),
International (1), National (2), Network Specific (3), Subscriber (4),
or
Abbreviated (6).
Phone Context
The Phone-Context SIP URI parameter.
Configuring the Routing Tables
Use this submenu to configure the gateway’s IP
Æ
Tel and Tel
Æ
IP routing tables and their
associated parameters.
Tel to IP Routing Table
The Tel to IP Routing Table is used to route incoming Tel calls to IP addresses. This routing
table associates a called / calling telephone number’s prefixes with a destination IP address
or with an FQDN (Fully Qualified Domain Name). When a call is routed through the VoIP
gateway (Proxy isn’t used), the called and calling numbers are compared to the list of
prefixes on the IP Routing Table (up to 50 prefixes can be configured); 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 the Telephone to IP Routing Table.
However, if you want to use fallback routing when communication with Proxy is lost, or to use
the ‘Filter Calls to IP’ and IP Security features, or to obtain different SIP URI host names (per
called number), you need to configure the IP Routing Table.
For the Tel to IP Routing table to take precedence over a Proxy for routing calls,
set the parameter ‘PreferRouteTable’ to 1. The gateway checks the 'Destination IP
Address' field in the 'Tel to IP Routing' table for a match with the outgoing call.
Only if a match is not found, a Proxy is used.
Possible uses for Telephone to IP Routing can be as follows:
Can fallback to internal routing table if there is no communication with the Proxy.
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