Duplication For Reliability; Basic Server And Ipsi Connections; High Reliability Connectivity - Avaya MCC1 Maintenance Procedures

Hardware configurations

Duplication for reliability

Duplication for reliability
S8700 only
The S8700 has duplicated components to increase the reliability of the system. If one duplicated
component fails, the other can take over without impacting service or minimizing the impact. Which
components are duplicated in your system depends on the level of reliability chosen for your
configuration: duplex, high, or critical reliability. Consult the following sections for descriptions of these
different reliability levels and their configurations:
• Standard and High Reliability configurations
• Critical Reliability configuration
The S8700 IP Connect architecture has duplex reliability. This means that the media server is duplicated,
so that one is always active and the other is on standby — ready to take over in case the active one goes
down. This duplex-reliability configuration is shown in
on page 104.

Basic server and IPSI connections

The S8700 Media Server uses the IP Server Interface (IPSI) to control port networks and provide tone,
clock, and call classification services. The IPSI board connects to the control network by way of Ethernet.
S8700 IP
The IPSIs provide transport of CCMS messages over IP allowing the media server to communicate with
the port networks over the customer provided LAN. In an IP Connect configuration, there are two media
servers and one IPSI per port network. Each media server is connected to the Ethernet switch which is on
the LAN for connectivity to the IPSIs.
IPSI circuit packs are described in more detail in the Hardware Guide for Avaya Communication
Manager, 555-233-200.
S8700 MC

High reliability connectivity

In a high-reliability Multi-Connect configuration there are duplex media servers, duplex control
networks, and duplex IPSIs in each of the IPSI-connected port networks. However, the bearer network is
not duplicated. The control network is duplicated so that a single fault in the control network, such as a
bad Ethernet switch, will not bring the whole system down.
Each of the media servers connect to each of the control networks via the Ethernet switches. Each of the
Ethernet switches connect to each of the IPSIs in the port networks. Each of the port networks connect to
the single bearer network.
102
Figure 13, S8700 IP Connect duplex reliability,
Maintenance Procedures
December 2003