Alcatel 060170-10, User Manual, Page: 22 / 430

Elements of a Converged Network
Page 1-8
Gateways are considered H.323 terminals or H.323 endpoints in H.323 IP networks. Termi-
nals are also the endpoints where telephone lines connect to network circuits. Terminals
provide real time, two-way communications for local area network (LAN) endpoint destina-
tions. All terminals as such must support voice communications and H.245 in-band call
controls to use and negotiate channels. See also abbreviated
International Telecommunica-
tion Union (ITU) Standards on page 1-17.
VoIP H.323 Gatekeeper (Optional)
The H.323 Gatekeeper (server or workstation) is the device that verifies client VoIP privileges
and translates telephone numbers into IP addresses. It should be noted that H.323 gatekeep-
ers are not required to use Alcatel’s H.323 VoIP Gateway. In lieu of an H.323 VoIP gate-
keeper, Alcatel’s H.323 VoIP gateway uses its patent-pending Alcatel VoIP Network Dialing
Scheme (AVNDS) to perform IP address translations.
♦
Note
♦
Gatekeeper setup, installation and configuration
procedures are beyond the scope of this manual.
Alcatel recommends and has tested extensively use
of Alcatel’s H.323 VoIP gateway with the NT100
RADVision Gatekeeper.
Gatekeeper devices identify, track and control traffic flowing through them, and perform
other functions such as gateway registration, admission and bandwidth controls.