Installation guide

36 Planning and Installation Guide ShoreTel 14.2
Planning and System Design System Capacity
2
The following tables contain information on how to select a server for your ShoreTel implementation.
Server requirements are specified in four tiers:
 Servers for small systems that support up to 500 users.
 Servers for medium sized systems that support up to 2,500 users.
 Servers for large systems that support up to 10,000 users.
 Servers for very large systems that support up to 20,000 users.
Table 9 describes the key capacity limits for each of the new server tiers and includes the following
concepts:
 BHCC (Busy Hour Call Completion) per system is the total number of calls in the system during
the busy hour including internal and external calls and including calls terminated to desk phones,
softphones, trunks, or server applications such as voicemail.
 BHCC per server is based on the number of calls actually handled by the server during the
business hour including workgroup calls in menus and queues, auto-attendant calls and calls to
the voicemail service.
 The ShoreTel report generation tools that run on the server are configured by default to run at a
lower priority than other, more critical services. A light demand of report generation should have
little or no affect on a server with adequate minimum performance specifications. If you are a
heavy report user or experience any degradation of voicemail or other server prompts on an
underpowered server, you must move up to the next tier level of servers.