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Signaling resources
The TN799 C-LAN circuit pack provides the interface for a signaling channel between an IP
endpoint and a packet bus (which ultimately interfaces with the Avaya server). When an IP
endpoint, G350 MG, or G700 MG registers to a C-LAN circuit pack, a software object known as
a C-LAN socket is allocated for that endpoint or gateway to use, for as long as it remains
registered. C-LAN sockets are also required for the support of certain adjuncts.
Each C-LAN circuit pack can only support a finite number of C-LAN sockets. The total number
of C-LAN circuit packs that are required to support a particular system depends on the total
required number of C-LAN sockets, which in turn depends on the total number of IP endpoints,
G350 MGs, G700 MGs, and adjuncts. Once the required number of C-LAN circuit packs is
determined, their physical placement is not particularly important. An individual C-LAN circuit
pack can support endpoints in different Network Regions, even those that are not administered
to communicate with each other.
Media processing and TDM resources
The media processing resources on TN2302 Media Processing circuit packs on a PN, a G650
Media Gateway, provide the gateway for an audio channel between an IP endpoint and a
circuit-switched TDM bus. On a G350 or G700 Media Gateway, the media processing resources
reside on an on-board VoIP module. A G700 Media Gateway can accommodate an optional
extra VoIP module as well. The media stream for a call between a circuit-switched endpoint and
an IP endpoint on a PN or MG traverses the PN's or MG's TDM bus, a TN2302 Media
Processing circuit pack or a VoIP module (as applicable), and an IP network. The media stream
for a call between two circuit-switched endpoints on a single port network or Media Gateway
uses that PN or Media Gateway's TDM bus, and does not require any media processing
resources. However, the media stream for a call between two circuit-switched endpoints that
reside on different circuit-switched facilities (that is, two different PNs, two different Media
Gateways, or one PN and one Media Gateway) traverses each circuit-switched facility's TDM
bus, a media processing resource on each circuit-switched facility (a Media Processing circuit
pack or VoIP Media Module, as applicable), and an IP network.
streams between Avaya endpoints
media streams.
on page 164 shows some examples of the various possible
Resource sizing
Figure 56: Examples of media
Issue 3.4.1 June 2005
163
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