From: Mason, Robert (romason@xxxxxxxxx)
Date: Sun Mar 17 2002 - 23:24:00 GMT-3
Frank,
The admission control is the big issue with the "gatekeeper" and yes the
router (aka gateway) can be and often is the gatekeeper (although it does
not have to be.)
gatekeeper
1. The component of an H.323 conferencing system that performs call address
resolution, admission control, and subnet bandwidth management.
2. Telecommunications: H.323 entity on a LAN that provides address
translation and control access to the LAN for H.323 terminals and gateways.
The gatekeeper can provide other services to the H.323 terminals and
gateways, such as bandwidth management and locating gateways. A gatekeeper
maintains a registry of devices in the multimedia network. The devices
register with the gatekeeper at startup and request admission to a call
from the gatekeeper.
gateway
In the IP community, an older term referring to a routing device. Today,
the term router is used to describe nodes that perform this function, and
gateway refers to a special-purpose device that performs an
application-layer conversion of information from one protocol stack to
another. Compare with router.
router
Network layer device that uses one or more metrics to determine the optimal
path along which network traffic should be forwarded. Routers forward
packets from one network to another based on network layer information.
Occasionally called a gateway (although this definition of gateway is
becoming increasingly outdated). Compare with gateway. See also relay.
Source: http://www.cisco.com/univercd/cc/td/doc/cisintwk/ita/g12.htm
HTH
Robert
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Frank Kim
Sent: Monday, March 18, 2002 10:55 AM
To: ccielab@groupstudy.com
Subject: OT VOIP question: Gatekeeper vs Gateway
Does anyone know what is the difference between a gatekeeper and a gateway
in the voip world?
Also can a 7200VXR voice-gateway be used as a gatekeeper as well? Thanks
for any help.
-Frank
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