CTI Products MCN Server 8000 - Manual (Page 151)

MCN Client Program
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Client Program Notes
Data Loading & Cache Files
The Client program gets its data from the MCN Server. The first time a Client connects to a server, it
loads the system configuration files from the Server. Once it loads the data, it will save a copy of the
data in a local data cache.
When the Client connects to a Server, it will check to see if its local cache is current. If so, it will use
the local cache to speed up the connection. If the cache is not current, it will re-load the data from the
server.
It may take a long time to load the data file the first time or after it has changed. This could tame a
matter of many minutes, especially with large systems, large Display Tables and when the Client is
connected to the Server via routers.
Backup MCN Servers
The Client program can access backup MCN Servers (if present). When the connection to the main
server is lost, the program will try to connect to the backup server(s).
IP Multicast Required
The MCN Server sends the real-time data to the Client software over IP Multicast. The network routers
and switches between the Server and Client must support IP Multicast and must pass the IP Multicast
Group and Port configured in the MCN Server.
IP Multicast Error Windows
Error windows will be displayed for the following IP Multicast errors:
1. If the network is blocking the IP Multicast traffic, the Client will display an error message
indicating that it is not receiving Multicast traffic.
2. If the Client sees IP Multicast traffic from a different Server on the configured IP Multicast
address, it will display a "Foreign Multicast" error window. (Each MCN Server must have its
own Multicast IP address.)