Mid-market to large enterprise
Issue 6 January 2008 91
Remote G700, G450, G350, G250, or G150 Media Gateway - The S8700-series Server can
provide the call processing features for a remote G700, G450, G350, or G250 media gateway
over an H.248 link, and G150 gateway using H.323. In this configuration, the S8700 can support
up to 250 G700, G450, 350, 250, or 150 Media Gateways. An S8300 media module that is
located in a G700, G450, G350, or G250 Media Gateway in a remote location provides
survivability when the primary controller is inaccessible. For more information, see S8300 as
an
LSP on page 43.
Another option for survivability of remote gateways is an S8500 Server configured as a Local
Survivable Processor (LSP).
Center Stage Switch
The Center Stage Switch (CSS) is a connection hub that provides inter-port network
communication between four or more port networks. Often, the CSS is incorporated into smaller
configurations to allow for growth. The CSS consists of from one to three switch nodes (SN),
which reside in a Port Network carrier. SNs are composed of one or two switch node carriers,
depending on whether the solution is being duplicated for critical reliability. Port Network
expansion depends on internal SN-to-SN traffic, according to the following guidelines:
● 1 SN expands from 1 to up to 15 PNs.
● 2 SNs expands to up to 29 PNs.
● 3 SNs expands to up to 44 PNs.
ATM network
The Asynchronous Transfer Mode (ATM) switch is a replacement option for the CSS, or for the
direct-connect switch. Several Avaya ATM switch types can provide Port Network connectivity.
Non-Avaya ATM switches that comply with the ATM standards that are set by the European
Union can also provide Port Network connectivity.
ATM-Port Network Connectivity (ATM-PNC) allows any ATM switch or ATM network that
complies with specified standards and capacities to serve as the means to connect to the PNs.
In this type of configuration, the ATM switch or network replaces the CSS. ATM-PNC is used to
connect port networks within a single switch. The WAN Spare Processor (WSP) is not
supported. One ATM supports up to 64 PNs.
