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A new installation consists of the G650 Media Gateways for all port networks. The MCC1 Media Gateway or the SCC1 Media Gateway are used for housing the switch node carrier(s) needed for center stage switch, for migrating configurations, and for configurations experiencing growth. The IPSI extends Ethernet control by connecting the S8700 Media Server processor to the PNs.
The CSS is a connection hub that provides PN communication. A CSS can be used when more then three port networks are needed. Often the CSS is incorporated into smaller configurations to allow for growth. The CSS consists of from one to three switch nodes (SN). SNs are composed of one or two switch node carriers, depending on whether the solution is being duplicated for critical reliability. PN expansion depends on internal SN-to-SN traffic, according to the following guidelines:
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.
When the voice bearer is sent over ATM, 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 PN. 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 is not supported.
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