System Calculator; Ip Phone Percentage - Mitel MiVoice Office 250 Manual Book

MiVoice Office 250 Engineering Guidelines
DSP RESOURCE
Local IP Phones +
UVM (on PS-1) +
NuPoint UM +
File-Based MOH
Conference Ports
Remote IP Phones +
UVM (on Base Server) +
IP Trunks +
SIP Trunks +
IP Networking +
T.38 Fax
Mid Call Features
Media Stream Resources (MSRs) used for DTMF
and IVR. (Note that DTMF MSR may be allocated
on either the Main Processor Module or PEC-1;
the IVR MSR can be allocated on the main
processor module only, not on a PEC-1.)
Mitel recommends consulting the System Calculator if one of the following is true:
• If the site has more than 50 devices that consume a resource with a lower cost.
• If the site has more than 25 devices that consume a resource with a higher cost.
• If the site count of lower-cost and higher-cost devices total more than 30.

SYSTEM CALCULATOR

The System Calculator can help to determine whether or not a system requires a PEC-1. It can
also be used to determine how close the system is to requiring a PEC-1 to accommodate future
growth.

IP PHONE PERCENTAGE

For most systems, it is not cost effective to have a one-to-one ratio of phones to trunks.
Apart from an inbound call center or outbound dialing center, a typical system does not require
a large percentage of phones to be on an outside call at the same time. This same principle is
carried over to the DSP resources.
16
Table 1: DSP Resource Costs
Lower
Higher
Lower
RESOURCE COST