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TANDBERG Gatekeeper User Guide
Page 42 of 105
In addition, the DNS records should be updated with the address of the Border Controller as the
authoritative Gatekeeper for the enterprise (see Appendix A). This ensures that calls placed using URI
dialing enter and leave the enterprise through the Border Controller, allowing successful traversal of the
firewall.
Figure 18: Configuring IP interface
9.3. Receiving a Call Using URI Dialing
When an incoming call has been placed using URI dialing, the Gatekeeper will receive a request
containing the dialed URI in the form user@host. As described in DNS Records (section 9.4), several
mechanisms could have been used to locate the Gatekeeper. Depending on which was used, the
received URI could be in one of three forms:
user@10.0.0.1
user@srv.record.domain.name
user@a.record.domain.name
Each of these should be able to discover an endpoint registered as either user or
user@a.record.domain.name.
On receipt of the URI the Gatekeeper will modify the URI by removing the @ and host if the host matches
either:
The IPv4 or IPv6 address of the Gatekeeper, or
The system name of the system.
The Gatekeeper will then search for registrations which match either the modified URI, or the modified
URI with its own Local Domain Domain Name appended.