Specifications

62 Hardware Description and Reference for Avaya Communication Manager
maintain the duplication when it takes call processing control from the main server. To support
duplication, an S8500 ESS must also contain a dual-NIC card.
Note:
Note: An ESS may support a G150, G250, G350, or G700 Media Gateway through the
C-LAN connection of the ESS-connected port network.
Note:
Note: An S8500 Media Server, as a main server, does not support a duplicated control
network. Additionally, if the main server is an S8500 Media Server, any ESS that
supports the main server must also be an S8500 Media Server.
An ESS can support CSS-connected or ATM-connected port networks, as well as IP-connect
port networks, in the main server’s configuration. However, the ESS normally uses the
customer LAN, and therefore IP-connect port network connectivity, to provide both backup
control and bearer traffic when the main server connection is lost.
Requirements to support CSS- and ATM-connected port networks
Each CSS-connected port network that is to receive ESS service must also contain a
TN2312BP IPSI circuit pack and TN570 Expansion Interface circuit packs with vintage D or
higher. Vintage D of the TN570 allows the TN570 to appropriately share control from the server
with the IPSI. To be survivable, any CSS-connected port networks must have an IPSI to get
service from an ESS and a TN2302AP IP Media Processor or a TN2602AP IP Media Resource
320 to have port network connectivity to the other PNs. A PN without an IPSI will lose service
when the main server connection fails.
Each ATM-connect port network that is to receive ESS service must also contain TN2305 or
TN2306 ATM Interface circuit packs with vintage B or higher. Vintage B of the TN2305/2306
allows the TN2305/2306 to appropriately share control by the server with the IPSI. Any
ATM-connected port network that does not have an IPSI may still receive service if the port
network maintains its connection to the ATM switch and the ATM switch still communicates with
one or more IPSI-controlled port networks.
For more information about ESS setup, operation, or feature functionality, see Avaya Enterprise
Survivable Servers (ESS) User Guide, 03-300428.
S8300 Media Server in an LSP mode
The S8300 LSP is located in the G700 Media Gateway and provides survivability when the
S8500 Media Server is inaccessible. Each S8500 Media Server can have up to 250 LSPs. The
S8300 LSP can support up to 50 H.248 media gateways.The LSP has a copy of the S8500
Media Server customer translations.
Power outages
In most cases, an Avaya solution can recover from a power outage or other failure instantly,
regardless of the source of the failure. Each PN includes a set of segmented, parallel buses. If
one of the paired segments fails, the other bus segment continues to handle communications.
The UPS units supply power to the control complex.