Gatekeeper; Ip Hardware - NEC UX5000 Hardware Manual

5.1.5

Gatekeeper

Whenever an H.323 terminal activates, a check is made of the network to see if there are any gatekeepers
available. When a gatekeeper is present, it provides users with:
●
Address Translation
Users typically do not know the IP addresses of other terminals. When a user makes a call, the
gatekeeper translates an alias address (name or number) to the destination address.
●
Admissions Control
Users will not all be able to access the network at the same time because of limited shared resources.
Gatekeepers may restrict network access based on call authorization, bandwidth usage, or some other
criteria. It is important to note that Admissions Control is a way to preserve the integrity of the calls
(provide QoS guarantees) that are already up and operating when a user requests access.
●
Bandwidth Control
Besides network access control, the gatekeeper offers network managers the ability to restrict or assign
bandwidth to different applications along certain protocol conventions. This is another place network
managers can enforce QoS guarantees and other enterprise-wide usage policies.
5.1.1

IP Hardware

:
Blade
●
VOIPDB - The VOIPDBs provide channel (32, 64 or 128) voice packet gateway unit and work as a
media gateway for VoIP communication. The VoIP daughter board is required for either VoIP trunks or
when using VoIP keysets which talk to non-IP keysets. VoIP keyset-to-VoIP keyset can talk without a
media gateway and without using any DSP resources using the Peer-to-Peer feature. Refer to the VoIP
feature in the UX5000 Software Manual for more detail on the Peer-to-Peer feature.
:
Terminals
●
IP-CTS, P/N 0910080 (black)
●
IP-24e, P/N 0910068 (black) or 0910070 (white)
●
IP-12e, P/N 0910064 (black) or 0910066 (white)
●
IP-6v, P/N 0910062 (black)
●
IP-2v, P/N 0910060 (black)
Chapter 5
Chapter 5 - LAN Connection
5 - 3