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96 Avaya Application Solutions IP Telephony Deployment Guide
Critical reliability configuration
The critical reliability configuration option is built upon the high reliability configuration. In the
critical reliability configuration, the bearer network has duplicated components so that there is
no single point of failure. The critical reliability configuration consists of the following
components:
● Two S8700-series Servers
● Two IPSI circuit packs in each IPSI-connected port network
● Two Ethernet switches
● Two UPS units
● Two CSS/ATM EI (Expansion Interface) in every port network
S8700-series fiber-PNC survivability
In addition to the high reliability of the duplicated S8700-series Servers, the S8300 or S8500
Server in a Local Survivable Processor (LSP) configuration can be used to provide survivability
for H.248 branch gateways and IP phones. Additional recovery capability is embedded in the
Communication Manager that resides on the S8700-series Server.
The S8500 and S8700-series Servers provide survivability for remote G650 Media Gateways
and port networks with IPSI.
Avaya S8700-series Server IP-PNC configuration
The S8700 IP-PNC configuration is an all-IP solution that is built on open IP network
connection. This solution is designed for medium to large enterprises. The main difference
between the IP-PNC and fiber-PNC configurations is that IP-PNC uses the IP network for all
inter-port network communication whereas fiber-PNC uses optic-fiber connections between the
PNs in a CSS or ATM network.
The IP-PNC platform is scalable to 64 Port Networks, each of which can house up to five G650s
and up to 250 G700, G450, G350, G250, or G150 Media Gateways. The server complex still
consists of duplicated S8700-series Servers. One server is active, and the other server is on
standby. See Table 4:
Avaya Application Solutions comparison matrix — components,
performance, and capacities on page 34 for information on the S8700-series Server
performance and capacities.
Figure 30:
Avaya S8700-series Server with remote G650 / G700 / G350 Media Gateways on
page 97 shows an example of an S8700 with remote G700 Media Gateways.