SIP User's Manual 130 Document #: LTRT-68806
Mediant 2000 & TP-1610 & TP-260/UNI
Note: If the Internal SRV table is configured, the gateway first tries to resolve a
domain name using this table. If the domain name isn't found, the gateway
performs an SRV resolution using an external DNS server.
¾ To configure the Internal SRV table, take these 9 steps:
1. Open the 'Internal SRV Table' screen (Protocol Management menu > Routing
Tables submenu > Internal SRV Table option).
Figure 5-19: Internal SRV Table Screen
2. In the 'Domain Name' field, enter the hostname to be translated. You can enter a
string up to 31 characters long.
3. From the 'Transport Type' drop-down list, select a transport type.
4. In the 'DNS Name 1' field, enter the first DNS A-Record to which the hostname is
translated.
5. In the 'Priority', 'Weight' and 'Port' fields, enter the relevant values
6. Repeat steps 4 through 5, for the second and third DNS names, if required.
7. Repeat steps 2 through 6, for each Internal SRV Table entry.
8. Click the Submit button to save your changes.
9. To save the changes so they are available after a hardware reset or power fail, refer to
'Saving Configuration' on page 256.
5.5.4.6 Reasons for Alternative Routing
The 'Reasons for Alternative Routing' screen includes two groups: IP to Tel Reasons and
Tel to IP Reasons. Each group enables you to define up to four different release reasons. If
a call is released as a result of one of these reasons, the gateway tries to find an
alternative route to that call. The release reason for IP-to-Tel calls is provided in Q.931
notation. The release reason for TelÆIP calls is provided in SIP 4xx, 5xx, and 6xx
response codes. For Tel-to-IP calls an alternative IP address is provided; for IP-to-Tel calls
an alternative trunk group is provided. Refer to 'Tel to IP Routing Table' on page 122 for
information on defining an alternative IP address; refer to 'IP to Trunk Group Routing' on
page 126 for information on defining an alternative trunk group.
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